{"id":39385,"date":"2024-09-17T16:27:16","date_gmt":"2024-09-17T15:27:16","guid":{"rendered":"https:\/\/www.gear4music.com\/blog\/?p=39385"},"modified":"2024-09-17T16:27:49","modified_gmt":"2024-09-17T15:27:49","slug":"audio-feedback","status":"publish","type":"post","link":"https:\/\/www.gear4music.com\/blog\/audio-feedback\/","title":{"rendered":"What Is Audio Feedback and How Do I Fix It?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#What_is_audio_feedback\" >What is audio feedback?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#9_tips_for_preventing_audio_feedback\" >9 tips for preventing audio feedback<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#1_Watch_your_levels\" >1. Watch your levels<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#2_Mic_and_speaker_placement\" >2. Mic and speaker placement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#3_Look_at_your_monitoring\" >3. Look at your monitoring<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#4_Signal_flow_and_gain_staging\" >4. Signal flow and gain staging<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#5_Feedback_suppressors\" >5. Feedback suppressors<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#6_Acoustic_treatment\" >6. Acoustic treatment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#7_Use_EQ\" >7. Use EQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#8_Time_alignment\" >8. Time alignment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#9_Be_vigilant\" >9. Be vigilant<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#What_to_do_when_audio_feedback_occurs\" >What to do when audio feedback occurs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#FAQs\" >FAQs<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#What_is_an_example_of_audio_feedback\" >What is an example of audio feedback?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#Why_am_I_getting_audio_feedback\" >Why am I getting audio feedback?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#How_do_I_get_rid_of_audio_feedback\" >How do I get rid of audio feedback?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.gear4music.com\/blog\/audio-feedback\/#Final_thoughts\" >Final thoughts<\/a><\/li><\/ul><\/nav><\/div>\n<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;][et_pb_row _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text admin_label=&#8221;Intro&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Feedback: the enemy of audio engineers, musicians, and concertgoers the world over.<\/p>\n<p>It can mess up live mixes, band practices, and studio recording sessions alike, so how do we identify the source? And what do we do about it when we identify the problem? How can we prevent feedback before it occurs? This is our guide to what<b> audio feedback <\/b>is and how you can stop it from happening.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;What is audio feedback?&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||||false|false&#8221; border_width_top=&#8221;2px&#8221; border_color_top=&#8221;gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f&#8221; global_colors_info=&#8221;{%22gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f%22:%91%22border_color_top%22%93}&#8221;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_audio_feedback\"><\/span>What is audio feedback?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>At its core, audio feedback occurs when the playback of an audio signal is loud enough to be picked back up by an input source. In simpler terms, a feedback loop happens when the output of a <strong><a href=\"https:\/\/www.gear4music.com\/PA_Equipment\/Speakers.html\" target=\"_blank\" rel=\"noopener\">speaker<\/a><\/strong> is so loud that a sound source like a <strong><a href=\"https:\/\/www.gear4music.com\/PA_Equipment\/Microphone.html\" target=\"_blank\" rel=\"noopener\">microphone<\/a><\/strong> picks it up again.<\/p>\n<p>The speaker will then try to recreate its own output, resulting in the speaker playing back the capture of its own output, resulting in the awful screeching noise we all know and hate.<\/p>\n<p>This can be a result of the output of the speaker being too loud, the input gain of the microphone being too high, or the microphone and speaker being too close together. A lot of different elements can cause this, and depending on the space you\u2019re in, it may not always be easy to fix, but there are a lot of ways to correct it if you have the right approach.<\/p>\n<p>[\/et_pb_text][et_pb_button url_new_window=&#8221;on&#8221; button_text=&#8221;SHOP LIVE SOUND GEAR&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;NEW CTA Button&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;14px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#0e95cf&#8221; button_border_width=&#8221;0px&#8221; button_border_color=&#8221;#0e95cf&#8221; button_font=&#8221;Arial|700|||||||&#8221; button_icon=&#8221;&#x35;||divi||400&#8243; button_icon_color=&#8221;#FFFFFF&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;10px|30px||30px|false|false&#8221; hover_enabled=&#8221;0&#8243; box_shadow_style=&#8221;preset6&#8243; box_shadow_blur=&#8221;2px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; button_url=&#8221;https:\/\/www.gear4music.com\/PA_Equipment.html&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_button][et_pb_button url_new_window=&#8221;on&#8221; button_text=&#8221;SHOP STUDIO EQUIPMENT&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;NEW CTA Button&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;14px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#0e95cf&#8221; button_border_width=&#8221;0px&#8221; button_border_color=&#8221;#0e95cf&#8221; button_font=&#8221;Arial|700|||||||&#8221; button_icon=&#8221;&#x35;||divi||400&#8243; button_icon_color=&#8221;#FFFFFF&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;10px|30px||30px|false|false&#8221; hover_enabled=&#8221;0&#8243; box_shadow_style=&#8221;preset6&#8243; box_shadow_blur=&#8221;2px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; button_url=&#8221;https:\/\/www.gear4music.com\/Studio-Equipment.html&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_button][et_pb_text admin_label=&#8221;9 tips for preventing audio feedback&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||||false|false&#8221; border_width_top=&#8221;2px&#8221; border_color_top=&#8221;gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f&#8221; global_colors_info=&#8221;{%22gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f%22:%91%22border_color_top%22%93}&#8221;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_tips_for_preventing_audio_feedback\"><\/span>9 tips for preventing audio feedback<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1_Watch_your_levels\"><\/span>1. Watch your levels<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-39543 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-300x300.jpg\" alt=\"Rock concert in Merriweather Post Pavilion\" width=\"300\" height=\"300\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-300x300.jpg 300w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-1024x1024.jpg 1024w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-600x600.jpg 600w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-768x768.jpg 768w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-1080x1080.jpg 1080w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-1280x1280.jpg 1280w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-980x980.jpg 980w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-480x480.jpg 480w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion.jpg 1500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>The first port of call is always the level of volume between speakers and microphones. In the context of live music, is the front-of-house PA system too loud and the mics are picking that up? Or is the input gain of an on-stage mic too high?<\/p>\n<p>If it\u2019s an issue while recording, is the monitoring signal coming out of headphones or speakers and feeding back into a mic? Identify the root of the problem by looking at the channel causing feedback on your mixer or interface.<\/p>\n<p>For anything that should be silent but isn\u2019t, it will be the mic that\u2019s causing the issue. Try to lower its input gain and that should fix it. If it\u2019s all of the channels, or multiple mics near each other, the problem is the speaker output volume.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"2_Mic_and_speaker_placement\"><\/span>2. Mic and speaker placement<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>If it isn\u2019t volume that\u2019s the problem, it\u2019ll be positioning and <strong><a href=\"https:\/\/www.gear4music.com\/blog\/microphone-polar-patterns-everything-you-need-to-know\/\" target=\"_blank\" rel=\"noopener\">polar patterns<\/a><\/strong> causing the issue. What polar pattern is the microphone that&#8217;s causing the feedback? How close is it to the speaker? In smaller venues and compact home studios, feedback like this can be easy to encounter, and it\u2019ll take some clever manipulation of space and audio to fix the problem.<\/p>\n<p>Omnidirectional microphones cause feedback in tight spaces for obvious reasons, and cardioid mics might have too wide a pickup pattern for the space they\u2019re in and pick up speaker signals from the sides. Watch for figure-eight polar patterns, too; their strong rear pickup could be grabbing signal from an angle you haven\u2019t thought about.<\/p>\n<p>Make sure your mics aren\u2019t pointing towards any speakers that could be causing feedback, and if you\u2019re sure they\u2019re properly spaced and directed, it may be worth considering using supercardioid or hypercardioid mics to narrow this field and let you get more out of your space.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"3_Look_at_your_monitoring\"><\/span>3. Look at your monitoring<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-39544 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Sennheiser-in-ear-monitors-300x300.jpg\" alt=\"Sennheiser in-ear monitors\" width=\"300\" height=\"300\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Sennheiser-in-ear-monitors-300x300.jpg 300w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Sennheiser-in-ear-monitors-480x480.jpg 480w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Sennheiser-in-ear-monitors.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>Whether you\u2019re in a studio control room recording vocals or running sound in a venue, monitoring signals can get picked up, too. As much as we all love blasting a mix over midfield monitors in the studio to impress the band we\u2019re working with, if you have mics set up in the control room, it might not be the best idea.<\/p>\n<p>Monitor speaker placement is key both in studios and live venues. Investing in a multi-channel headphone amp like the <strong><a href=\"\/Recording-and-Computers\/SubZero-HPA800-8-Channel-Rack-Headphone-Amplifier\/2BNN\" target=\"_blank\" rel=\"noopener\">SubZero HPA800<\/a><\/strong> for the studio will also help this.<\/p>\n<p>In the case of live sound, on-stage monitor wedges are another common source of feedback, so picking up a wireless in-ear monitoring system like the <strong><a href=\"\/PA-DJ-and-Lighting\/Sennheiser-XSW-IEM-SET-Wireless-In-Ear-Monitor-System-E-Band\/481A\" target=\"_blank\" rel=\"noopener\">Sennheiser XSW IEM SET<\/a><\/strong> will help prevent that.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"4_Signal_flow_and_gain_staging\"><\/span>4. Signal flow and gain staging<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Think of what else in your space transmits or picks up audible signals that could be interfering with your sound. If it\u2019s not a mic and it\u2019s not your main speakers, think smaller.<\/p>\n<p>Guitar cab speakers can be another source of feedback, as can guitar pickups, since they can be somewhat microphonic and capture other sounds around them. Even electro-acoustic guitar pickups could be at fault, believe it or not!<\/p>\n<p>There\u2019s a reason brands like Martin make <strong><a href=\"\/Guitar-and-Bass\/Martin-18ACFBB-Feedback-Buster-Acoustic-Soundhole-Cover\/2PZ4\" target=\"_blank\" rel=\"noopener\">guitar soundhole covers<\/a><\/strong> to help prevent this. Proper gain settings for every sound source and playback in your space is key, be mindful of what\u2019s playing back where, and how loud it\u2019s doing so.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"5_Feedback_suppressors\"><\/span>5. Feedback suppressors<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-39545 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-300x300.jpg\" alt=\"Live gig\" width=\"300\" height=\"300\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-300x300.jpg 300w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-1024x1024.jpg 1024w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-600x600.jpg 600w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-768x768.jpg 768w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-1080x1080.jpg 1080w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-1280x1280.jpg 1280w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-980x980.jpg 980w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-480x480.jpg 480w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig.jpg 1350w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>Sometimes the only solution is the most obvious. Feedback suppressors are a key part of most live sound setups rather than a backup for when nothing else will correct the problem. These are a great failsafe and most live sound engineers will try to have one of these for outboard processing.<\/p>\n<p>Feedback suppressors act as extremely narrow notch filters, like EQ that are fixed to very thin bandwidths, so they don\u2019t change any other frequencies within a signal. Some will automatically detect feedback, and some will need to be set manually instead.<\/p>\n<p>Some engineers will use a graphic EQ to fill this function in a pinch too, or as a preventative measure, but given their affordability and usefulness, a feedback suppressor is a worthwhile investment in most cases.<\/p>\n<p>We recommend the <strong><a href=\"\/PA-DJ-and-Lighting\/dbx-AFS2-Advanced-Feedback-Suppression-Processor\/1A28\" target=\"_blank\" rel=\"noopener\">dbx AFS2<\/a><\/strong> for its automatic detection, live and fixed modes, and dual-channel architecture that can be applied to your mixer\u2019s stereo output.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"6_Acoustic_treatment\"><\/span>6. Acoustic treatment<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Acoustic treatment is far more complex than just slapping some foam panels on the walls, as <strong><a href=\"\/blog\/how-to-set-up-your-studio-monitors\/\" target=\"_blank\" rel=\"noopener\">our guide to acoustic treatment<\/a><\/strong> shows.<\/p>\n<p>Feedback can be caused by a buildup of specific frequencies in the room due to the typical behaviour of sound in enclosed spaces. Standing waves exaggerating certain frequencies, particularly lower frequencies can build up in unlikely places and cause feedback.<\/p>\n<p>Plus, things like baffles and enclosures used to isolate microphones while recording or live-miking certain sources can help keep mics that you can\u2019t otherwise isolate out of the way of speakers. This will also reduce the effects of reverb that can also create buildups of specific frequencies.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"7_Use_EQ\"><\/span>7. Use EQ<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-28643 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-300x300.jpg\" alt=\"G4M 500 Series EQ\" width=\"300\" height=\"300\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-300x300.jpg 300w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-1024x1024.jpg 1024w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-600x600.jpg 600w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-768x768.jpg 768w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-1080x1080.jpg 1080w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-980x980.jpg 980w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-480x480.jpg 480w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ.jpg 1200w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>So, we\u2019ve talked about automatic feedback suppression systems and how they notch out narrow frequency bands to prevent buildup in problematic areas. But graphic EQ, the live engineer\u2019s stalwart, is another great way of doing this manually.<\/p>\n<p>Especially if you don\u2019t have a feedback suppressor to hand, monitoring your signal path with a spectrum analyser on a digital mixer or your laptop to find any frequency buildups and gently dipping them with a graphic EQ is an excellent preventative measure.<\/p>\n<p>In the studio, if your space isn\u2019t acoustically treated or still has some issues you haven\u2019t had the opportunity to fix yet, you can do this with plugins or graphic EQ too, whatever you have to hand!<\/p>\n<p>This can be especially useful if you\u2019re doing a more live-style recording session with a band where things can suddenly build up in a crowded live room.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"8_Time_alignment\"><\/span>8. Time alignment<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Time alignment helps to keep speakers in an audio system firing at the same time. For studios with multiple monitor pairs, surround or Atmos setups, or talkback speakers, you want these to fire at the same time &#8211; as delays in signal might mean that something gets captured by a mic when you don\u2019t want it to.<\/p>\n<p>The same goes for live sound, perhaps even more critically. You want front-of-house PA, floor monitors, fill-in speakers, and subwoofers to feel synchronised because it\u2019ll sound terrible for both the crowd and the performers otherwise. Making sure the sound arrives where and when it\u2019s supposed to by adding delays is key to setting up a PA system in any venue.<\/p>\n<p>Without doing so, the same issues caused by untreated spaces can crop up easily, standing waves and phase cancellation can cut information out and create an excess of frequencies. Getting this right is perhaps more important and achievable for live venues than acoustic treatment in terms of impact on the quality of sound the audience hears.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"9_Be_vigilant\"><\/span>9. Be vigilant<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-39547 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-300x300.jpg\" alt=\"Live guitarist\" width=\"300\" height=\"300\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-300x300.jpg 300w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-1024x1024.jpg 1024w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-600x600.jpg 600w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-768x768.jpg 768w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-1080x1080.jpg 1080w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-1280x1280.jpg 1280w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-980x980.jpg 980w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-480x480.jpg 480w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist.jpg 1500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>Even when things are going smoothly, engineers need to keep their ears &#8211; and eyes &#8211; open for the potential of a sudden issue cropping up.<\/p>\n<p>It&#8217;s important to monitor channels, frequencies, and changes in songs, so you may receive signs of upcoming feedback before it happens.<\/p>\n<p>For example, if a vocalist steps too far forward in a smaller venue, the proximity of the microphones to the front-of-house PA system will cause feedback.<\/p>\n<p>You may get sudden, short-lived squeals of feedback before it gets particularly bad, so keep an eye out for what\u2019s happening on stage and your monitoring systems, audio interface, or mixer so you can nip a problem in the bud.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;What to do when audio feedback occurs&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||||false|false&#8221; border_width_top=&#8221;2px&#8221; border_color_top=&#8221;gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f&#8221; global_colors_info=&#8221;{%22gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f%22:%91%22border_color_top%22%93}&#8221;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_to_do_when_audio_feedback_occurs\"><\/span>What to do when audio feedback occurs<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>What to do when feedback occurs depends somewhat on your circumstances and the tools you have to hand. However, the best course of action in the studio is to cut or mute the channel causing feedback. Then, you can see if your recorded sound is affected and try to root out the cause.<\/p>\n<p>Reposition speakers, adjust the gain on mics, turn down speaker output volumes, swap mics for something with a different polar pattern or more headroom, whatever makes sense to the cause.<\/p>\n<p>Live sound can be tougher because the last thing you want to do is cut a mic and break the flow of a performance. The best course of action is to tweak your graphic EQ to cut the offending frequency band. Check where your performers are on the stage, too.<\/p>\n<p>If somebody gets too close to the PA system, you can talk to them over their in-ears and make sure they stay a little further back on the stage where possible.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-39546 size-full\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop.jpg\" alt=\"Audio feedback loop\" width=\"1330\" height=\"665\" srcset=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop.jpg 1330w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-600x300.jpg 600w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-1024x512.jpg 1024w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-768x384.jpg 768w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-1080x540.jpg 1080w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-1280x640.jpg 1280w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-980x490.jpg 980w, https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop-480x240.jpg 480w\" sizes=\"auto, (max-width: 1330px) 100vw, 1330px\" \/><\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;FAQs&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||||false|false&#8221; border_width_top=&#8221;2px&#8221; border_color_top=&#8221;gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f&#8221; global_colors_info=&#8221;{%22gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f%22:%91%22border_color_top%22%93}&#8221;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"What_is_an_example_of_audio_feedback\"><\/span>What is an example of audio feedback?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>An example of audio feedback is the high-pitched screeching sound often heard when a microphone picks up sound from nearby speakers. This occurs when the microphone and speakers create a feedback loop, amplifying and re-amplifying sound.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"Why_am_I_getting_audio_feedback\"><\/span>Why am I getting audio feedback?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>You are getting audio feedback because sound from speakers is being captured by a microphone, creating a continuous loop of amplified sound. This often happens when the microphone and speakers are too close or the volume is too high.<\/p>\n<hr \/>\n<h4><span class=\"ez-toc-section\" id=\"How_do_I_get_rid_of_audio_feedback\"><\/span>How do I get rid of audio feedback?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>To get rid of audio feedback, reposition the microphone away from the speakers and lower the volume. You can also use directional microphones and feedback suppressors to help prevent the feedback loop from occurring.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Final thoughts&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;20px||||false|false&#8221; hover_enabled=&#8221;0&#8243; border_width_top=&#8221;2px&#8221; border_color_top=&#8221;gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f&#8221; global_colors_info=&#8221;{%22gcid-45928375-1fd3-4d7e-b1f0-0adee316b54f%22:%91%22border_color_top%22%93}&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Final_thoughts\"><\/span>Final thoughts<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Audio feedback<\/strong> can be a pervasive problem in audio, but there are a lot of ways to deal with it, identify it, and prevent it before it happens. Hopefully, this guide has helped you feel better about that awful screeching so that the next time it comes up you can fix it quickly and efficiently.<\/p>\n<p>Remember to think about mic and speaker positioning first and foremost, and be ready to respond quickly, and you won\u2019t have to worry about feedback again!<\/p>\n<p>Want to learn more? Check out some more of our live sound guides:<\/p>\n<p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/stage-lighting-design\/\" target=\"_blank\" rel=\"noopener\">A Guide to Stage Lighting Design and Putting on a Stellar Show<\/a><\/strong><\/p>\n<p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/condenser-vs-dynamic-mics\/\" target=\"_blank\" rel=\"noopener\">Condenser vs. Dynamic Mics &#8211; Which One Do I Need?<\/a><\/strong><\/p>\n<p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/best-pa-speakers\/\" target=\"_blank\" rel=\"noopener\">The 9 Best PA Speakers for Bands and Solo Performers<\/a><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; column_structure=&#8221;1_2,1_2&#8243;][et_pb_column _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; type=&#8221;1_2&#8243;][et_pb_button url_new_window=&#8221;on&#8221; button_text=&#8221;SHOP LIVE SOUND GEAR&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;NEW CTA Button&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;14px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#0e95cf&#8221; button_border_width=&#8221;0px&#8221; button_border_color=&#8221;#0e95cf&#8221; button_font=&#8221;Arial|700|||||||&#8221; button_icon=&#8221;&#x35;||divi||400&#8243; button_icon_color=&#8221;#FFFFFF&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;10px|30px||30px|false|false&#8221; hover_enabled=&#8221;0&#8243; box_shadow_style=&#8221;preset6&#8243; box_shadow_blur=&#8221;2px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; button_url=&#8221;https:\/\/www.gear4music.com\/PA_Equipment.html&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_button][\/et_pb_column][et_pb_column _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; type=&#8221;1_2&#8243;][et_pb_button url_new_window=&#8221;on&#8221; button_text=&#8221;READ MORE LIVE SOUND GUIDES&#8221; button_alignment=&#8221;center&#8221; admin_label=&#8221;NEW CTA Button&#8221; _builder_version=&#8221;4.17.4&#8243; _module_preset=&#8221;default&#8221; custom_button=&#8221;on&#8221; button_text_size=&#8221;14px&#8221; button_text_color=&#8221;#FFFFFF&#8221; button_bg_color=&#8221;#0e95cf&#8221; button_border_width=&#8221;0px&#8221; button_border_color=&#8221;#0e95cf&#8221; button_font=&#8221;Arial|700|||||||&#8221; button_icon=&#8221;&#x35;||divi||400&#8243; button_icon_color=&#8221;#FFFFFF&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;10px|30px||30px|false|false&#8221; hover_enabled=&#8221;0&#8243; box_shadow_style=&#8221;preset6&#8243; box_shadow_blur=&#8221;2px&#8221; global_colors_info=&#8221;{}&#8221; theme_builder_area=&#8221;post_content&#8221; button_url=&#8221;https:\/\/www.gear4music.com\/blog\/category\/live-sound\/live-sound-guides\/&#8221; sticky_enabled=&#8221;0&#8243;][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Feedback: the enemy of audio engineers, musicians, and concertgoers the world over. It can mess up live mixes, band practices, and studio recording sessions alike, so how do we identify the source? And what do we do about it when we identify the problem? How can we prevent feedback before it occurs? This is our guide to what audio feedback is and how you can stop it.<\/p>\n","protected":false},"author":13,"featured_media":39542,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"<p>Feedback: the enemy of audio engineers, musicians, and concertgoers the world over.<\/p><p>It can mess up live mixes, band practices, and studio recording sessions alike, so how do we identify the source? And what do we do about it when we identify the problem? How can we prevent feedback before it occurs? This is our guide to what<b> audio feedback <\/b>is and how you can stop it from happening.<\/p><hr \/><h3>What is audio feedback?<\/h3><p>At its core, audio feedback occurs when the playback of an audio signal is loud enough to be picked back up by an input source. In simpler terms, a feedback loop happens when the output of a <strong><a href=\"https:\/\/www.gear4music.com\/PA_Equipment\/Speakers.html\" target=\"_blank\" rel=\"noopener\">speaker<\/a><\/strong> is so loud that a sound source like a <strong><a href=\"https:\/\/www.gear4music.com\/PA_Equipment\/Microphone.html\" target=\"_blank\" rel=\"noopener\">microphone<\/a><\/strong> picks it up again.<\/p><p>The speaker will then try to recreate its own output, resulting in the speaker playing back the capture of its own output, resulting in the awful screeching noise we all know and hate.<\/p><p>This can be a result of the output of the speaker being too loud, the input gain of the microphone being too high, or the microphone and speaker being too close together. A lot of different elements can cause this, and depending on the space you\u2019re in, it may not always be easy to fix, but there are a lot of ways to correct it if you have the right approach.<\/p><hr \/><h3>9 tips for preventing audio feedback<\/h3><h4>1. Watch your levels<\/h4><p><img class=\"size-medium wp-image-39543 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Rock-concert-in-Merriweather-Post-Pavilion-300x300.jpg\" alt=\"Rock concert in Merriweather Post Pavilion\" width=\"300\" height=\"300\" \/>The first port of call is always the level of volume between speakers and microphones. In the context of live music, is the front-of-house PA system too loud and the mics are picking that up? Or is the input gain of an on-stage mic too high?<\/p><p>If it\u2019s an issue while recording, is the monitoring signal coming out of headphones or speakers and feeding back into a mic? Identify the root of the problem by looking at the channel causing feedback on your mixer or interface.<\/p><p>For anything that should be silent but isn\u2019t, it will be the mic that\u2019s causing the issue. Try to lower its input gain and that should fix it. If it\u2019s all of the channels, or multiple mics near each other, the problem is the speaker output volume.<\/p><hr \/><h4>2. Mic and speaker placement<\/h4><p>If it isn\u2019t volume that\u2019s the problem, it\u2019ll be positioning and <strong><a href=\"https:\/\/www.gear4music.com\/blog\/microphone-polar-patterns-everything-you-need-to-know\/\" target=\"_blank\" rel=\"noopener\">polar patterns<\/a><\/strong> causing the issue. What polar pattern is the microphone that's causing the feedback? How close is it to the speaker? In smaller venues and compact home studios, feedback like this can be easy to encounter, and it\u2019ll take some clever manipulation of space and audio to fix the problem.<\/p><p>Omnidirectional microphones cause feedback in tight spaces for obvious reasons, and cardioid mics might have too wide a pickup pattern for the space they\u2019re in and pick up speaker signals from the sides. Watch for figure-eight polar patterns, too; their strong rear pickup could be grabbing signal from an angle you haven\u2019t thought about.<\/p><p>Make sure your mics aren\u2019t pointing towards any speakers that could be causing feedback, and if you\u2019re sure they\u2019re properly spaced and directed, it may be worth considering using supercardioid or hypercardioid mics to narrow this field and let you get more out of your space.<\/p><hr \/><h4>3. Look at your monitoring<\/h4><p><img class=\"size-medium wp-image-39544 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Sennheiser-in-ear-monitors-300x300.jpg\" alt=\"Sennheiser in-ear monitors\" width=\"300\" height=\"300\" \/>Whether you\u2019re in a studio control room recording vocals or running sound in a venue, monitoring signals can get picked up, too. As much as we all love blasting a mix over midfield monitors in the studio to impress the band we\u2019re working with, if you have mics set up in the control room, it might not be the best idea.<\/p><p>Monitor speaker placement is key both in studios and live venues. Investing in a multi-channel headphone amp like the <strong><a href=\"\/Recording-and-Computers\/SubZero-HPA800-8-Channel-Rack-Headphone-Amplifier\/2BNN\" target=\"_blank\" rel=\"noopener\">SubZero HPA800<\/a><\/strong> for the studio will also help this.<\/p><p>In the case of live sound, on-stage monitor wedges are another common source of feedback, so picking up a wireless in-ear monitoring system like the <strong><a href=\"\/PA-DJ-and-Lighting\/Sennheiser-XSW-IEM-SET-Wireless-In-Ear-Monitor-System-E-Band\/481A\" target=\"_blank\" rel=\"noopener\">Sennheiser XSW IEM SET<\/a><\/strong> will help prevent that.<\/p><hr \/><h4>4. Signal flow and gain staging<\/h4><p>Think of what else in your space transmits or picks up audible signals that could be interfering with your sound. If it\u2019s not a mic and it\u2019s not your main speakers, think smaller.<\/p><p>Guitar cab speakers can be another source of feedback, as can guitar pickups, since they can be somewhat microphonic and capture other sounds around them. Even electro-acoustic guitar pickups could be at fault, believe it or not!<\/p><p>There\u2019s a reason brands like Martin make <strong><a href=\"\/Guitar-and-Bass\/Martin-18ACFBB-Feedback-Buster-Acoustic-Soundhole-Cover\/2PZ4\" target=\"_blank\" rel=\"noopener\">guitar soundhole covers<\/a><\/strong> to help prevent this. Proper gain settings for every sound source and playback in your space is key, be mindful of what\u2019s playing back where, and how loud it\u2019s doing so.<\/p><hr \/><h4>5. Feedback suppressors<\/h4><p><img class=\"size-medium wp-image-39545 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-gig-300x300.jpg\" alt=\"Live gig\" width=\"300\" height=\"300\" \/>Sometimes the only solution is the most obvious. Feedback suppressors are a key part of most live sound setups rather than a backup for when nothing else will correct the problem. These are a great failsafe and most live sound engineers will try to have one of these for outboard processing.<\/p><p>Feedback suppressors act as extremely narrow notch filters, like EQ that are fixed to very thin bandwidths, so they don\u2019t change any other frequencies within a signal. Some will automatically detect feedback, and some will need to be set manually instead.<\/p><p>Some engineers will use a graphic EQ to fill this function in a pinch too, or as a preventative measure, but given their affordability and usefulness, a feedback suppressor is a worthwhile investment in most cases.<\/p><p>We recommend the <strong><a href=\"\/PA-DJ-and-Lighting\/dbx-AFS2-Advanced-Feedback-Suppression-Processor\/1A28\" target=\"_blank\" rel=\"noopener\">dbx AFS2<\/a><\/strong> for its automatic detection, live and fixed modes, and dual-channel architecture that can be applied to your mixer\u2019s stereo output.<\/p><hr \/><h4>6. Acoustic treatment<\/h4><p>Acoustic treatment is far more complex than just slapping some foam panels on the walls, as <strong><a href=\"\/blog\/how-to-set-up-your-studio-monitors\/\" target=\"_blank\" rel=\"noopener\">our guide to acoustic treatment<\/a><\/strong> shows.<\/p><p>Feedback can be caused by a buildup of specific frequencies in the room due to the typical behaviour of sound in enclosed spaces. Standing waves exaggerating certain frequencies, particularly lower frequencies can build up in unlikely places and cause feedback.<\/p><p>Plus, things like baffles and enclosures used to isolate microphones while recording or live-miking certain sources can help keep mics that you can\u2019t otherwise isolate out of the way of speakers. This will also reduce the effects of reverb that can also create buildups of specific frequencies.<\/p><hr \/><h4>7. Use EQ<\/h4><p><img class=\"size-medium wp-image-28643 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2023\/07\/G4M-500-Series-EQ-300x300.jpg\" alt=\"G4M 500 Series EQ\" width=\"300\" height=\"300\" \/>So, we\u2019ve talked about automatic feedback suppression systems and how they notch out narrow frequency bands to prevent buildup in problematic areas. But graphic EQ, the live engineer\u2019s stalwart, is another great way of doing this manually.<\/p><p>Especially if you don\u2019t have a feedback suppressor to hand, monitoring your signal path with a spectrum analyser on a digital mixer or your laptop to find any frequency buildups and gently dipping them with a graphic EQ is an excellent preventative measure.<\/p><p>In the studio, if your space isn\u2019t acoustically treated or still has some issues you haven\u2019t had the opportunity to fix yet, you can do this with plugins or graphic EQ too, whatever you have to hand!<\/p><p>This can be especially useful if you\u2019re doing a more live-style recording session with a band where things can suddenly build up in a crowded live room.<\/p><hr \/><h4>8. Time alignment<\/h4><p>Time alignment helps to keep speakers in an audio system firing at the same time. For studios with multiple monitor pairs, surround or Atmos setups, or talkback speakers, you want these to fire at the same time - as delays in signal might mean that something gets captured by a mic when you don\u2019t want it to.<\/p><p>The same goes for live sound, perhaps even more critically. You want front-of-house PA, floor monitors, fill-in speakers, and subwoofers to feel synchronised because it\u2019ll sound terrible for both the crowd and the performers otherwise. Making sure the sound arrives where and when it\u2019s supposed to by adding delays is key to setting up a PA system in any venue.<\/p><p>Without doing so, the same issues caused by untreated spaces can crop up easily, standing waves and phase cancellation can cut information out and create an excess of frequencies. Getting this right is perhaps more important and achievable for live venues than acoustic treatment in terms of impact on the quality of sound the audience hears.<\/p><hr \/><h4>9. Be vigilant<\/h4><p><img class=\"size-medium wp-image-39547 alignright\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Live-guitarist-300x300.jpg\" alt=\"Live guitarist\" width=\"300\" height=\"300\" \/>Even when things are going smoothly, engineers need to keep their ears - and eyes - open for the potential of a sudden issue cropping up.<\/p><p>It's important to monitor channels, frequencies, and changes in songs, so you may receive signs of upcoming feedback before it happens.<\/p><p>For example, if a vocalist steps too far forward in a smaller venue, the proximity of the microphones to the front-of-house PA system will cause feedback.<\/p><p>You may get sudden, short-lived squeals of feedback before it gets particularly bad, so keep an eye out for what\u2019s happening on stage and your monitoring systems, audio interface, or mixer so you can nip a problem in the bud.<\/p><p>\u00a0<\/p><p>\u00a0<\/p><hr \/><h3>What to do when audio feedback occurs<\/h3><p>What to do when feedback occurs depends somewhat on your circumstances and the tools you have to hand. However, the best course of action in the studio is to cut or mute the channel causing feedback. Then, you can see if your recorded sound is affected and try to root out the cause.<\/p><p>Reposition speakers, adjust the gain on mics, turn down speaker output volumes, swap mics for something with a different polar pattern or more headroom, whatever makes sense to the cause.<\/p><p>Live sound can be tougher because the last thing you want to do is cut a mic and break the flow of a performance. The best course of action is to tweak your graphic EQ to cut the offending frequency band. Check where your performers are on the stage, too.<\/p><p>If somebody gets too close to the PA system, you can talk to them over their in-ears and make sure they stay a little further back on the stage where possible.<\/p><p><img class=\"aligncenter wp-image-39546 size-full\" src=\"https:\/\/storage.googleapis.com\/stateless-blog-g4m-co-uk\/2024\/09\/Audio-feedback-loop.jpg\" alt=\"Audio feedback loop\" width=\"1330\" height=\"665\" \/><\/p><hr \/><h3>FAQs<\/h3><h4>What is an example of audio feedback?<\/h4><p>An example of audio feedback is the high-pitched screeching sound often heard when a microphone picks up sound from nearby speakers. This occurs when the microphone and speakers create a feedback loop, amplifying and re-amplifying sound.<\/p><hr \/><h4>Why am I getting audio feedback?<\/h4><p>You are getting audio feedback because sound from speakers is being captured by a microphone, creating a continuous loop of amplified sound. This often happens when the microphone and speakers are too close or the volume is too high.<\/p><hr \/><h4>How do I get rid of audio feedback?<\/h4><p>To get rid of audio feedback, reposition the microphone away from the speakers and lower the volume. You can also use directional microphones and feedback suppressors to help prevent the feedback loop from occurring.<\/p><hr \/><h3>Final thoughts<\/h3><p><strong>Audio feedback<\/strong> can be a pervasive problem in audio, but there are a lot of ways to deal with it, identify it, and prevent it before it happens. Hopefully, this guide has helped you feel better about that awful screeching so that the next time it comes up you can fix it quickly and efficiently.<\/p><p>Remember to think about mic and speaker positioning first and foremost, and be ready to respond quickly, and you won\u2019t have to worry about feedback again!<\/p><p>Want to learn more? Check out some more of our live sound guides:<\/p><p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/stage-lighting-design\/\" target=\"_blank\" rel=\"noopener\">A Guide to Stage Lighting Design and Putting on a Stellar Show<\/a><\/strong><\/p><p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/condenser-vs-dynamic-mics\/\" target=\"_blank\" rel=\"noopener\">Condenser vs. Dynamic Mics - Which One Do I Need?<\/a><\/strong><\/p><p><strong><a href=\"https:\/\/www.gear4music.com\/blog\/best-pa-speakers\/\" target=\"_blank\" rel=\"noopener\">The 9 Best PA Speakers for Bands and Solo Performers<\/a><\/strong><\/p>","_et_gb_content_width":"","_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[244,111],"tags":[108,290,169],"class_list":["post-39385","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-live-sound-guides","category-live-sound","tag-featured","tag-guide","tag-live-sound"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is Audio Feedback and How Do I Fix It? | Gear4music<\/title>\n<meta name=\"description\" content=\"How do you stop that pesky audio feedback from occurring? 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