hi robert, feedback suppression should be quite easy to achive w/ the vasp external. fft the incoming signal. check if there are 1 or 2 bands which are much louder than their neighbours. if so multiply that bands which an adjustable value <1 and than take the ifft. feedback noise is a pure sine (until it's getting so loud that it' distorts) so they don't have overtones and cause a significant peak in at most 2 neighbouring bands.
sven.
That strategy seems like it'd be good for a piece of dedicated hardware to do. Do you know of any?
-Ian
sven wrote:
hi robert, feedback suppression should be quite easy to achive w/ the vasp external. fft the incoming signal. check if there are 1 or 2 bands which are much louder than their neighbours. if so multiply that bands which an adjustable value <1 and than take the ifft. feedback noise is a pure sine (until it's getting so loud that it' distorts) so they don't have overtones and cause a significant peak in at most 2 neighbouring bands.
sven.
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I know some because I did a http://www.google.com/search?q=%22feedback+suppressor%22&sourceid=opera&... just a few minutes ago... sven.
That strategy seems like it'd be good for a piece of dedicated hardware to do. Do you know of any?
-Ian
sven wrote:
hi robert, feedback suppression should be quite easy to achive w/ the vasp external. fft the incoming signal. check if there are 1 or 2 bands which are much louder than their neighbours. if so multiply that bands which an adjustable value <1 and than take the ifft. feedback noise is a pure sine (until it's getting so loud that it' distorts) so they don't have overtones and cause a significant peak in at most 2 neighbouring bands. sven.
I've used the getner before, and have been exposed to the vortex. These are in the class of "echo suppression" do deal with a lag between the input and the output (mics and speakers). Often used in video conferencing and other open mic/speaker setups.
they are HELL to configure and expensive...
I think McGill or UQAM are working on software echo-suppression stuff.... ?
B>
sven wrote:
I know some because I did a http://www.google.com/search?q=%22feedback+suppressor%22&sourceid=opera&...
just a few minutes ago... sven.
That strategy seems like it'd be good for a piece of dedicated hardware to do. Do you know of any?
-Ian
sven wrote:
hi robert, feedback suppression should be quite easy to achive w/ the vasp external. fft the incoming signal. check if there are 1 or 2 bands which are much louder than their neighbours. if so multiply that bands which an adjustable value <1 and than take the ifft. feedback noise is a pure sine (until it's getting so loud that it' distorts) so they don't have overtones and cause a significant peak in at most 2 neighbouring bands. sven.
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B. Bogart -
Ian Smith-Heisters -
sven