I think there is a problem with the " tempo change" effect. When I select all tracks with ctrl+ A and apply the effect it seems to affect all tracks but unequally.
Ex : track 1 and track 2 starts at the same time. After applying the effect, track 2 starts after track 1 despite being playing faster as well.
I tried affecting one track at a time but it sort of deletes the following tracks and I end up with a mess.
The problem is that “empty space” before the start of the track does not get stretched, but “silent audio” is stretched just like any other audio.
In order to ensure that all tracks are stretched the same amount, they must all have the same start time. As Gale wrote, the easiest way to do that is to generate a little silence at the beginning of every track.
I notice that track 1 starts before zero, so you will need to either drag all tracks a little to the right, or trim off the audio that is before zero.
Have we got the correct behaviour with time-changing effects, that they don’t stretch the white space before the start of the track? Paul thought they should act on white space before the track start, but then the track starts change.
Possibly not. The implementation is certainly not quite right in the current version because it causes bug 1215. I’ve not tested previous versions to see if it has always been like this.
Do you know why the current behaviour was decided on?