gkurtenbach
For example, if I use audiosnap to create tempo map with a tempo change at the start of each measure, then I try to draw smooth tempo changes between the measures, the location of the measures change so I lose sync between my audio and measure locations.
 

OK, I understand what you're saying now.  For my own pursuits (if I ever get as far as actually creating music and not just trying to master several synths) I'll be dealing exclusively with MIDI, so that's where my mind set is.  I'm pretty sure tempo manipulation with recorded audio is not much fun.

stevec


As posted above, I'd like to see a tempo envelope.   Along with a tempo offset mode, just like we have for volume envelopes.  
 

+1

gkurtenbach

Does anyone know of other music apps that represent tempo as curves and allow editing by dragging curve control points?

Cubase, Ableton Live (straight lines, not curves.  But you can drag tempo envelope points).

gkurtenbach

Ideally, what I want is "lock time at the start of these two points" and "let me manipulate a bezier curve" between these two points.

That would be FANTASTIC.

For me it would be enough to have the ability to simply multiply selected tempo map points by certain amount (or percentage). We have some spread-sheet-like table to the right of the tempo pane anyway.

What amazes me is the fact that such a simple task is still unavailable. All I want to do is select time range and adjust all tempi in that range in terms of BPM (old tempo > new tempo).

An even simpler method to implement would be the ability to select a portion of the tempo map and drag it up or down.

The limitation to this idea is that it would not preserve the relative ratios of the tempo changes. It would, however, be adequate 95% of the time, as global tempo changes are typically not radical ones, only a few bpm.

Bristol_Jonesey


Process > Length won't work - that just changes the length of MIDI notes, not their start times.

You'd just end up with a bunch of overlapping notes.

Process/Length offers two options - note duration OR start times.

Gkurtenbach:
Can't offer you a bezier curve to manipulate but, if you drag the tempo draw cursor whilst holding down Ctrl & Shift (with Snap to Grid off) Sonar will draw continuous events in a straight line that you can drag

yah, no super easy way. An envelope would be the best feature of all, because you could select part of it or all of it, which in this case would be the dream solution for the poster.

I hear him, I insert gobs of small tempo changes to "humanize" a performance. I've never tried to alter the whole thing after that tho.

I think the easiest way is to bounce it all down and then Audiosnap the mix, where it's much easier to speed up.

bitflipper

An even simpler method to implement would be the ability to select a portion of the tempo map and drag it up or down.

You're absolutely right, but we have tempo envelope with no "knots" on it which we could grab and drag, and that's the problem. Besides, sometimes there is need for much more precise tempo adjustments than dragging can provide.

The limitation to this idea is that it would not preserve the relative ratios of the tempo changes. It would, however, be adequate 95% of the time, as global tempo changes are typically not radical ones, only a few bpm.

 
I could live with absolute, non-relative tempo shifts, but then again, it would be nice to have both options at hand.