Has someone a simple noise gate patch to share?

Release (in ms.), threshold (db), hold (in ms.) and attack (in ms.)

Thanks a lot in advance for your help.

Excuse the naivety, but really how is this any different from a noise gate like so:

input
| \
| [env~]
| |
| [> 60]
| |
| [pack 0 100]
| |
| [vline~]
| |
[*~]
|
[dac~]

bump

a little noise gate gui, fairly configurable and automatable.

http://www.dafe.lukifer.net/pdpatches/crazymachineredux/envelope.pd

looks nice, but where does the threshold go?

I'm sorry, misthought the topic of discussion. I was thinking envelope generator for some reason.

maybe [threshold~]

LP

@ClaudiusMaximus said:

You can get a continuous envelope from the audio signal with:

in
| \
[*~]
|
[lop~ 10]
|
env

then you can turn it into a digital signal with parameters for a low pass filter for attack/release:

threshold attack coefficient
| |
env [dbtopow~] | release coefficient
| | | |
[expr~ $v1>$v2; if($v1>$v2, $v3, $v4)]
| |
d.env coef

next, you can low pass filter to smooth the signal, at different rates for attack/release:

d.env coef
| |
[pd low-pass-filter] -- check Miller's book on how to build filters using czero~ cpole~ etc
|
l.env

then multiply the input by the envelope

in l.env
| |
[*~]
|
out

hold time is more tricky to implement, and I'm not quite sure what that means for a noise gate.

I built a compressor/limiter in a similar way, not a very good one, but enough so that if I'm live-coding I can just feed everything into it and not have to worry too much about adjusting the volume to avoid clipping etc.

wow, that's elegant.

[mavg] is too cpu expensive? or at least more expensive than [*~] and [lop~]? I use [mavg] when need a smoother signal.

well, thankyou very much Claudius Optimus et Maximus.

Please could someone post an example patch of a noise gate that's easy for a newbie to understand? I can't get wither of the above to work correctly...

Thanks

there's one in the DIY2 library

check out mono-gate or st-gate

http://puredata.hurleur.com/sujet-1982-diy2-effects-sample-players-synths-sound-synthesis