[LAU] VC and jack

Moshe Werner moshwe at gmail.com
Tue Sep 27 06:18:50 UTC 2011

I hoe that I'm not totally out of context,
but wouldn't that introduce latency to the control signal (AD/DA
Why would it be preferable over MIDI in first place?


On Sun, Sep 25, 2011 at 8:13 PM, Renato <rennabh at gmail.com> wrote:

> Hello, I've never used hardware that uses VC, but sometime ago I had an
> idea, that probably many others have allready exploited (never heard of
> it though).
> If a control signal is exactly the same as an audio signal,
> just very lower in frequency, one could apply all the usual audio
> effects to control signal. You could for example turn a knob, have the
> signal it generates pass through a delay, reverb or whatever, and then
> have it control something (like the frequency of a synth).
> This seems an interesting idea I'd like to play with - the problem is,
> how can you do it in our linux-audio environment, where usually the
> knob generates midi CC data? Is it possible with some tricks to convert
> this to an audio signal (maybe way downsampled to not uselessly waste
> CPU) pass it through rakarrack or ladspa plugins, reconvert it to midi
> CC and have it control something?
> A more general thought: what about implementing a new type of generic
> "control" signal in JACK, and having existing audio apps accept these
> signals in their input? If you come to think of it, there's really no
> difference (other than sample rate) between a control signal and an
> audio signal, so there's no reason why one shouldn't be able to do DSP
> on control signals.
> cheers,
> renato
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