https://community.usa.canon.com/t5/Camcorders/Vixia-HF52-Audio-feedback/m-p/146478#M4910 <P>Try turning on manual level control for the external microphone.&nbsp; What you are hearing is the automatic gain control ramping up the gain when there is no audio coming in to the camera.</P> Sat, 18 Jul 2015 18:32:05 GMT jmacx2 2015-07-18T18:32:05Z https://community.usa.canon.com/t5/Camcorders/Vixia-HF52-Audio-feedback/m-p/138540#M4909 <P>I am using the HF52 as a source for a closed circuit tv to view in a building across the street from our church. &nbsp;We are running HDMI over coax and converting back to HDMI. &nbsp;</P><P>&nbsp;</P><P>For audio we are trying to connect to the sound board to the mic input. &nbsp;It works okay as long as there is something coming through the board such as music playing. &nbsp;When there is a pause, feedback starts up and builds with a loud hum until the music starts again. &nbsp;I need help to eliminate the feedback.</P> Wed, 15 Apr 2015 16:42:47 GMT https://community.usa.canon.com/t5/Camcorders/Vixia-HF52-Audio-feedback/m-p/138540#M4909 Rzrbk 2015-04-15T16:42:47Z https://community.usa.canon.com/t5/Camcorders/Vixia-HF52-Audio-feedback/m-p/146478#M4910 <P>Try turning on manual level control for the external microphone.&nbsp; What you are hearing is the automatic gain control ramping up the gain when there is no audio coming in to the camera.</P> Sat, 18 Jul 2015 18:32:05 GMT https://community.usa.canon.com/t5/Camcorders/Vixia-HF52-Audio-feedback/m-p/146478#M4910 jmacx2 2015-07-18T18:32:05Z