Re: [linux-audio-dev] Plugin APIs (again)

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Subject: Re: [linux-audio-dev] Plugin APIs (again)
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Mon Dec 09 2002 - 14:37:38 EET


On Mon, Dec 09, 2002 at 12:27:58AM +0100, David Olofson wrote:
> On Sunday 08 December 2002 12.48, Steve Harris wrote:
> [...getting control values...]
> > The problem is that the dsp code doesn't always know the real value
> > of a controller: if its expensive to calcuate the coefficients you
> > normally just calcuate them once for every N samples then
> > interpolate the coefficients, which bear no simple relation to the
> > controller value.
>
> Good point... However, if you're sending (or at least seeing) the
> input events, why would you need to ask the plugin about anything?

Yes, I agree entirely.
 
> > If the host is marshaling the events then it should know what the
> > last controller value it sent to the instrument was.
>
> It could also figure out what the interpolated value should be at any
> time - whatever use that would be, on this level.

Maybe... It's likely that the instrument is using some unknown finely
tuned interpolator/filter combination though. I also dont think it matters
:)

- Steve


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