## req: automatic audio singal source switcher

Device/Module Wishlist

Original topic on PlanetZ: https://forums.scopeusers.com/viewtopic.php?t=32999

#### req: automatic audio singal source switcher

Posted: Mon Jun 23, 2014 5:40 am
by pranza
hi!
i remember one very handy feature of rme digi 96/8 PAD card: you could set up what's being output if wave output is not active.
i'd like the same with pulsar: a simple signal source switcher which has two stereo inputs and one stereo output. output relays stream no1 unless there is a stream no2 present, in that case it relays stream no2 and first one is muted.
p

#### Re: req: automatic audio singal source switcher

Posted: Mon Jun 23, 2014 10:32 am
by capacitor
Gut reaction from here is a Modular patch. Would that work?
Going forward, you could tweak the internals as needed.
Let me know. I hope to get my card back in action this week, can put together a Mod3 patch.

#### Re: req: automatic audio singal source switcher

Posted: Mon Jun 23, 2014 3:13 pm
by Immanuel
You can do that with a sidechain limiter and a tiny mixer.

#### Re: req: automatic audio singal source switcher

Posted: Mon Jun 23, 2014 3:50 pm
by capacitor
...even easier

#### Re: req: automatic audio singal source switcher

Posted: Tue Jun 24, 2014 5:26 am
by pranza
thanks for replies
well, is sidechainer kosher enough? i mean would that mixer-limiter thingie be bit transparent?

#### Re: req: automatic audio singal source switcher

Posted: Tue Jun 24, 2014 1:36 pm
by Immanuel
If A is the input, that should mute B, you use A as the sidechain input for the limiter which is being fed with audio from B. Set the threshold at -96 and the ratio at inf. That should do it. If this is not enough ... repeat.

#### Re: req: automatic audio singal source switcher

Posted: Mon Jun 30, 2014 4:10 pm
by pranza
thanks!
made it, works.. but threshold is max -60 in standard sfp limiter, so not purist enough, not bit transparent for sure, but does the job