[gmpi] Re: Topic 6: Time representation
- From: "Angus F. Hewlett" <amulet@xxxxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Wed, 30 Apr 2003 13:56:35 -0400 (EDT)
On Wed, 30 Apr 2003 RonKuper@xxxxxxxxxxxx wrote:
> >>>
> calculate (musical time elapsed from now to next tempo change or end of
> current buffer, whichever is sooner)
> ...
> subtract musical time elapsed in this calculation from element's
> remaining delta
> <<<
> This algorithm will suffer some roundoff error, potentially losing or
> gaining a tick on every audio processing frame.
I accept that it will have rounding error. I do not accept that it is
likely to be as great as a tick per frame if you're using a float
representation of musical time internally).
> If you tell me that 1 tick
> of error doesn't count, I'll gladly forward every bug report from our
> customers that complain when their hear a "comb filter" effect between
> rendered soft synth tracks and their live counterparts. ;-)
Was this the problem you ran in to on P5?
> OK, seriously, I'm trying to understand how to actually implement a plugin
> this way. I need to stew on it for a few minutes.
I have some code here I can dig out (from DR-008's onboard pattern
sequencer... it's fairly primitve and crappy but it basically works).
> But then again, this discussion is about *requirements*.
And you're asking a bunch of coders? <grin>
> Does GMPI require musical time conversion anywhere on the time line? If not
> in version 1,
> maybe in some later version.
Probably, yes.
> If in some later version, why not in version
> 1, so Ron and Todor can shut up?<g>
Perhaps because it strikes me as the kind of problem that's difficult to
solve in a way that will keep every host vendor happy.
Regards,
Angus.
----------------------------------------------------------------------
Generalized Music Plugin Interface (GMPI) public discussion list
Participation in this list is contingent upon your abiding by the
following rules: Please stay on topic. You are responsible for your own
words. Please respect your fellow subscribers. Please do not
redistribute anyone else's words without their permission.
Archive: //www.freelists.org/archives/gmpi
Email gmpi-request@xxxxxxxxxxxxx w/ subject "unsubscribe" to unsubscribe
Other related posts:
