Re: [Lmuse-developer] [Lmuse-user] time stretchers and updating the tempomap

[Dan M. <al...@gm...>]

I thought MusE already did this and it just lacks an easy way to define
(most likely draw) a gradual tempo change on the GUI mastertrack editor?


On Mon, May 6, 2013 at 11:33 PM, Florian Jung <flo...@we...> wrote:

> Hi
>
> i'm just wondering where the time stretchers shall receive their
> keyframes from. all of these considerations will only affect the
> accurateness of time-stretched wave parts/events.
>
> basically there are two ways:
>
> 1. always conform to the tempo map.
>    this will work very fine when the tempomap is actually used, and is
>    not changed "live".
>    this will also work fine when MusE is running on external tempo sync,
>    but the external tempo hasn't changed.
>    MusE would then, during the last (full!) playback, record the
>    externally supplied tempo, and use this (old) tempomap for the new
>    playback.
>    this WILL glitch when the external tempo changed. because then, MusE
>    still adheres to the *old* tempo map, which is out-of-date.
>    this MIGHT glitch when the user edits the tempo near the playing
>    position *while playing*. Or uses the 200% / 50% button.
>
> 2. do weird guesswork, resulting in un-understandable code, and non-
>    optimal timings whenever there's a tempo slope. especially this will
>    also happen when there's a tempomap available, and while the final
>    downmix!
>
> 3. even weirder hybrid of both.
>
>
> Basically, i want and probably will go with 1.
>
> But is it okay for the user, that "unexpected" tempo changes might cause
> a single glitch during playback? Playing back a second time won't glitch
> any more, because muse knows about the new tempo map then.
>
> Just say "yes" :)
>
> greetings,
> flo
>
>
>
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