Comments on: Sound Reinforcement for Collina for Tsunami Victims http://www.fayid.com/20070107/sound-reinforcement-for-collina-for-tsunami-victims/ Fayid's personal blog Tue, 20 Jul 2010 10:36:30 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Fayid http://www.fayid.com/20070107/sound-reinforcement-for-collina-for-tsunami-victims/comment-page-1/#comment-72 Fayid Wed, 17 Jan 2007 15:57:46 +0000 http://www.fayid.com/?p=75#comment-72 Feedback suppressors eliminate the usually high pitched and undesirable squeals that occur when some frequencies output from the speakers are unintentionally looped back into the microphone or an input device. Feedback suppressors are especially useful when dealing with mission critical situations in less than ideal conditions. On this occasion, I used the Advanced Feedback Suppressor (AFS) of the dbx Drive Rack PA. The AFS on the Drive Rack PA offers customs settings for both fixed and live filters (that dynamically detects feedbacks as it occurs, in real-time). Advanced feedback suppressors are able to notch very tight Qs [Q=frequency/bandwidth] compared to an EQ, resulting in almost negligible or lossless change in the overall frequency envelope. In other words, you won't notice a change in the shape of the sound while it is eliminating the feedback. Do you need it in all your gigs? The answer is No. Feedbacks should first be avoided by proper setting of the gain of the system, with well placed mics and careful consideration of speaker placements in the venue. An AFS is generally needed if all else fails or, if there is a high chance that feedbacks are likely to occur. Related reading <a href="http://en.wikipedia.org/wiki/Audio_feedback" target="_blank" rel="nofollow" rel="nofollow">http://en.wikipedia.org/wiki/Audio_feedback</a> Hope this was useful. Feedback suppressors eliminate the usually high pitched and undesirable squeals that occur when some frequencies output from the speakers are unintentionally looped back into the microphone or an input device.

Feedback suppressors are especially useful when dealing with mission critical situations in less than ideal conditions.

On this occasion, I used the Advanced Feedback Suppressor (AFS) of the dbx Drive Rack PA. The AFS on the Drive Rack PA offers customs settings for both fixed and live filters (that dynamically detects feedbacks as it occurs, in real-time).

Advanced feedback suppressors are able to notch very tight Qs [Q=frequency/bandwidth] compared to an EQ, resulting in almost negligible or lossless change in the overall frequency envelope. In other words, you won’t notice a change in the shape of the sound while it is eliminating the feedback.

Do you need it in all your gigs? The answer is No. Feedbacks should first be avoided by proper setting of the gain of the system, with well placed mics and careful consideration of speaker placements in the venue.

An AFS is generally needed if all else fails or, if there is a high chance that feedbacks are likely to occur.

Related reading
http://en.wikipedia.org/wiki/Audio_feedback

Hope this was useful.

]]> By: Yami http://www.fayid.com/20070107/sound-reinforcement-for-collina-for-tsunami-victims/comment-page-1/#comment-68 Yami Wed, 17 Jan 2007 06:58:14 +0000 http://www.fayid.com/?p=75#comment-68 After the sound check,you were setting the feedback suppressor. Can you explain me the use of it?and is it necessary in all the gigs? After the sound check,you were setting the feedback suppressor. Can you explain me the use of it?and is it necessary in all the gigs?

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