[linux-audio-dev] XAP: Tuning

David Olofson david at olofson.net
Sat Dec 21 11:24:00 UTC 2002


On Friday 20 December 2002 12.50, Steve Harris wrote:
> On Thu, Dec 19, 2002 at 11:04:46 +0100, David Olofson wrote:
> > On Thursday 19 December 2002 23.01, Frank van de Pol wrote:
> > > On Thu, Dec 19, 2002 at 08:01:57PM +0100, David Olofson wrote:
> > > > What frequency does PITCH 0.0 correspond to?
> > >
> > > unadjusted pitch, A4 = 440 Hz
> >
> > Yeah, that was my first thought. Make 0.0 <==> 440 Hz, period.
> >
> > It has been suggested that it be a "system variable" or
> > something, but since we have linear pitch control anyway, you may
> > as will implement it as an optional TUNING control input on the
> > plugins that care. (Sequencers with direct PITCH output and scale
> > converters would care.)
>
> No, not optional, mandatory.

Why would you care if you take PITCH and output PITCH? (Event 
processors.)


> I think this would be a much easier
> way to ensure that global tuning works than having the
> sequencers/midi converters skew thier note->pitch outputs.

Yes, but then *everyone* has to implement it. No big deal, probably, 
but it's still an extra parameter that (almost) everyone has to deal 
with.


//David Olofson - Programmer, Composer, Open Source Advocate

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