Optional CV control for levels (VCA)?

[mxmilkiib]

Related to #55

[SpotlightKid]

Can you provide a usage scenario?

Am I right in concluding, that this would require an extra JACK input port for every CV signal? And if you wanted to control all channel levels individually, you'd need as many extra CV input ports as channels?

And if you have less CV input ports than controllable levels, you'd need some internal mechanism/setting to route from a CV input to a controlled level?

[mxmilkiib]

Use case would be to automate a sequence of volume changes for apps in a JACK graph. Prior art is Non Mixer.

I see this as a 'turn on individually for each channel that needs it, and a CV port for that channel appears directly after it in port order'.

On maybe one CV signal to serve for multiple channels - my take before was that those channels would probably be on a buss / group send anyway, so one CV could be enabled to control that group.

[SpotlightKid]

Just transferring information from IRC (#lad) over here:

You can use midimonster to create a JACK CV to MIDI client to control a jack_mixer channel's volume or balance,

Here's an example configuration for midimonster:

[backend jack]
debug = on

[jack jack1]
midi_out = midi out
cv_in = cv in min 0.0 max 1.0

[map]
jack1.cv_in > jack1.midi_out.ch0.cc11

Connect your CV source to the cv_in port of the midimonster JACK client and its midi_out port to jack_mixer's midi in port. Assign the volume or balance level you want to control to MIDI CC 11.

Here's a short demonstration video:

https://0x20.eu/nc/s/c8QYH7KqPFkTc42