Using mc.poly~ to toggle processing on and off
Nov 27 2018 | 9:47 pm
I'd like to turn off sections of a multichannel patch when they're not in use. Before mc. objects came along I'd use poly~ for this task. It's almost working here, too, but not quite. The processing turns on and off, but the 8 channels of audio are output as a single active channel and 7 silent channels. What am I missing here?
Is mc.voiceallocator~ and the busymap a better way to approach this problem?
Here's the poly~ (name it mc.poly-onoff.test)
And here's the test patch
- Nov 29 2018 | 3:55 pmAnswering my own question for future forum users: mc.poly~ sends messages to the first active voice unless otherwise specified. That's why the first channel in the patch above was operating as expected and the others were ignoring the input.Use a "setvalue 0 $1 " message to target the input to all voices of mc.poly~.Now on to figuring out how to use poly~ to encapsulate portions of patches that include both standard (mono) MSP signals and mc. multichannel objects. My hunch is I'll need to keep them separate. Otherwise when I mc.poly~ize a mono signal chain it'll get distributed across multiple voices.
- Nov 29 2018 | 6:45 pmhi holland.depending on what you are doing, you'll generally find that for cpu control in mc.* land you need to use mc.voiceallocator~ (or mc.noteallocator~), and leave mc.poly~ etc for other tasks. they are definitely the way to go, and very powerful.mc.voiceallocator~ takes a while to get your head around but the key in mc.* is managing the resources of the chain with the various properties (attributes) of the various mc.* objects in your patch, exposing them to the voice management system on a per channel basis. mc.* is more like jitter in some ways than old MSP land.HTH.
- Nov 30 2018 | 3:26 pmThanks STKR, I've started working with mc.voiceallocator~ and busymaps. It makes more sense to me when dealing with synthesis processes that are event driven. Much of what I do involves processing live input, so finding the right points along the chain where voices can be freed is taking a while to figure out.
- Nov 30 2018 | 5:49 pmi totally agree with that :)
- Feb 21 2020 | 11:27 amHey, I have a similar problem:the voicelallocator is great, but I can't find a way to turn a specific voice on/off. The release message takes a voice number as an argument, so I can say "release voice 7" and voice 7 goes off. But how can I turn on voice 7? The event message doesn't work that way. "event 7" just turns on the first free voice, not voice 7.Thanks all in advance!
