Fwd: Re: [linux-audio-dev] XAP: Pitch control

[David Olofson]

On Thursday 12 December 2002 13.26, Steve Harris wrote:
> On Wed, Dec 11, 2002 at 09:31:52 +0100, David Olofson wrote:
> > > A synth could still have a built in event
> > > processor, but it should only process linear_pitch events.
> >
> > Yes - but you could not implement a useful arpeggiator that way,
> > for example. It would do the wrong thing as soon as you're not
> > using 12tET anymore - and *now*, users wouldn't have clue as to
> > why this happens, because the synth *lies* and says that it cares
> > only about linear_pitch...
>
> I dont think thats true, all ET scales can be arpegiated trivially
> from the octave number,

Yes, but where do you get the octave number...?


> and arpegiate for non ET scales is a hard
> problem anyway, providing note numbers doesn't help.

Yes it does, since you need to deal *only* with the note number. The 
scale converter then generates the correct pitch for the notes in the 
scale that you reference. That's the whole point with using 
note_pitch and scale converters at all.

Obviously, this is *exactly* why you should not take note_input to a 
synth, and why arpeggiators should be separate plugins. Put a 
suitable scale converter *in between*, and "weird" scales are trivial 
to handle.


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

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