9 Dec
2002
9 Dec
'02
12:25 p.m.
On Monday 09 December 2002 16.30, Steve Harris wrote:
On Mon, Dec 09, 2002 at 02:59:10PM +0000, Steve Harris
wrote:
1. There is no "current scale". You may have different
scales for different instruments. (As a matter of
fact, you *do* most of the time IRL - except when
working exclusively with synths.)
2. I don't like one or more function for every other
event! There's a reason why I designed a totally
inlined event system. :-)
3. Who would use that, when you can just have control
inputs for note_pitch only or linear_pitch only?
I dont see how a plugin can usfully process and
note information
without any explicit knowledge of the scale (execpt for some
trivial cases, eg. octave shift, 5ths), but those can be handled
in linear pitch too.
Just to make it clear, I would have the host provide a pitch->note
number and note number->pitch mapping functions (for the "current
scale"). The note number would have no semantics.
Agreed.
That way things like oscillators, modualtors etc.
still get to run
efficiently, and somewhat unusal cases like odd scaled arpegiators
have a slight overhead, but there is only one pitch format.
Hmmm... On second thought, why support plugins with *both* note and
linear pitch inputs? It could just be a hint on the pitch control,
saying whether it expects note numbers or linear pitch values.
They're basically both contious pitch controls, but the note_pitch
version may be non-linear (non-ET scales), and will usually have a
different scale, such as 12.0 per octave.
Anyway, still the same thing: *plugins* should be used for
conversions between the two; not host callbacks.
Oh, and here's a good reason to actually use 12.0/octave for linear
pitch: You won't need any scale conversions at all, as long as you
use 12tET. :-) (That's why I decided to use that in Audiality in the
first place.)
//David Olofson - Programmer, Composer, Open Source Advocate
.- The Return of Audiality! --------------------------------.
| Free/Open Source Audio Engine for use in Games or Studio. |
| RT and off-line synth. Scripting. Sample accurate timing. |
`---------------------------> http://olofson.net/audiality -'
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