Re: [ecasound] copp-set causes pop with transport running

From: S. Massy <lists@email-addr-hidden>
Date: Thu Jun 21 2012 - 22:59:40 EEST

On Thu, Jun 21, 2012 at 04:00:45AM -1000, Joel Roth wrote:
> Hi,
> Nama fades volume on transport start/stop
> and track mute/unmute by issuing copp-set
> 20 times per second.
> Previously the sound changed smoothly.
> Recently S. Massy reported a pop on each vol or pan
> parameter change, and zipper noise during
> fades that use copp-set.
> I verified this with the following setup:
> # ecasound chainsetup file
> # general
> -b:256 -r:50 -z:nointbuf -z:db,100000 -n:"/home/jroth/nama/test0619/Setup.ecs" -X -z:noxruns -z:nopsr -z:mixmode,sum
> # audio inputs
> -a:1 -f:f32_le,2,44100 -i:loop,Master_in
> -a:3 -f:s16_le,2,44100 -i:null
> # audio outputs
> -a:1 -f:s16_le,2,44100 -o:alsahw,0,0,0
> -a:3 -f:f32_le,2,44100 -o:loop,Master_in
> # chain operators and controllers
> -a:1 -epp:50.00 -eadb:0.00,0.00
> -a:3 -eli:1047,220.00,1.00 -epp:50.00 -eadb:0.00,0.00
Was this your whole setup? I did a little bit more digging on this, and
some projects exhibit this behaviour, while others don't. My best guess
at this point is that a specific condition triggers an engine
disconnect/reconnect on copp-set, but I can't pinpoint it just yet.


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Received on Fri Jun 22 00:15:01 2012

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