Re: Sample-accurate parameter automation? Possibe at all with AUs?
Re: Sample-accurate parameter automation? Possibe at all with AUs?
- Subject: Re: Sample-accurate parameter automation? Possibe at all with AUs?
- From: JJB <email@hidden>
- Date: Tue, 11 Mar 2008 17:25:04 -0700
Couldn't you actually use audio to bus your control signal just like a
real patch cable - eat cpu, but I think you could parameter modulate at
up to 1/2 the sample rate & get true sample accurate parameter
automation, build a truly modular digital synth system for instance
where any audio output can be used to modulate any parameter. Isn't that
the way it should be? Some of the old analog step sequencers for
instance could be set to run at such a high speed that they would
effectively become FM Oscillators. Haven't seen that type of modulation
ability in any plug in.
- JJB
Brian Willoughby wrote:
I have long considered the potential to bus around the equivalent of
"control voltage" signals, just as flexibly as if they were audio. If
parameter event streams were added to the buses that AUs see, then we
could build modular synthesis graphs as easily as audio processing
graphs. This idea is a bit contrary to AudioUnits, since the user
might want a different graph for modulation control signals as
compared to the audio routing, but if the parameter event streams were
added, it would go a long way towards this possibility.
Brian Willoughby
Sound Consulting
On Mar 11, 2008, at 16:09, William Stewart wrote:
As for a stream of parameter events... we had this notion in general
sometime ago and we even defined in specific format type for this
kind of control stream (see CoreAudio/CoreAudioTypes.h)
However, there didn't seem to be a general interest in providing a
sample by sample parameter stream, so we've basically not done
anything further on it.
Audio units in general are pretty agnostic about what format they see
on given buses, so its something we could add if there was sufficient
interest from both AU and host app developers
Bill
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