[LAU] Feedback Cancellation Plugin

[Roger]

On 10/23/2016 10:09 AM, Johannes Kroll wrote:
> On Sun, 23 Oct 2016 09:37:11 +1100
> Roger <gurusonic at gmail.com> wrote:
>
>> Is this for removing feedback from an existing recording, or live?
> For live. I have several piezo pickups attached to different objects.
> The objects pick up the sound and start to vibrate, creating the
> feedback.
>
>
>> For an existing recording you could try Audacity's Spectral Editing.
>> For live, you should eq the PA and monitors before the performance to
>> minimize the problem areas, but trying to keep as close to flat response
>> as possible. It's simple but takes a lot to master. For monitors just
>> push the level until it feeds back and notch out in the equalizer. Then
>> cup the mic a little and notch any further feedback.  A good RTA may
>> help here although I've heard people use them to tune FOH and the mix
>> ended up sounding truly awful.
>> - Best - good third octave equaliser and a good pair of ears
>> - Less good but possibly helpful - one of those feedback suppressor units
> A "Feedback Suppressor Unit" in software is exactly what I'm looking
> for, yes. I'm aware it would change the sound, I could live with that.
> .
>
I just had a look around the webz. There are quite a few hardware ones 
from Behringer FBQ2496 at $199 to Rupert Neve Designs 5045 Primary 
Source Enhancer at $1799. The only software one was from Waves, 
obviously not Linux.

Careful EQ should enable a significant increase in level combined with 
careful mic placement. You piezo mics are probably omnidirectional which 
is a big disadvantage.

I also found this RaneNote which gives a good explanation - 
http://www.rane.com/note158.html

Cheers

Roger