Subject: Re: [linux-audio-dev] XAP: Pitch control
From: Steve Harris (S.W.Harris_AT_ecs.soton.ac.uk)
Date: Wed Dec 11 2002 - 01:33:25 EET
On Tue, Dec 10, 2002 at 09:22:13PM +0100, David Olofson wrote:
> > > It *does* hurt the 12tET case, at least unless you're suggesting
> > > that sequencers should always store 1.0/octave...?
> >
> > I thought sequencers were going to send note numbers?
>
> Sequencers are going to store pitch in the form of floats. The
> argument is about whether these should be in 1.0/note or (1/12)/note
> format. (And this has nothing to do with scales or notes/octave; it's
> <something>/note, period.)
Well, some sequencers will want to work in pure ptich and not care about
notes at all (probably not many, but some).
> > The tone/scale magic is hardly ever useful though, it it forces
> > everyone else to work around a factor of 12.
>
> Or forces a few (or so we seem to thing) to work around a factor of
> 1/12...
Sure, but its fewer.
> Either way, this is the situation: We have to pick *two* out of three
> good things:
>
> 1. 1.0/octave
> 2. 1.0/note
> 3. No conversions for 12tET.
>
> I think I would pick 1 + 2, and accept that conversion is required
> whenever you want to drive 1.0/octave from 1.0/note, but you rejected
> that.
Did I? That wasn't my intention. I'm happy as long as pitch is 1.0/octave,
if notes are 1.0/note too then thats even better.
The host callback thing was just a suggestion to avoid the use of scale
converters.
- Steve
This archive was generated by hypermail 2b28 : Wed Dec 11 2002 - 01:36:30 EET