Working on some sound effects creation I ran into the problem of moving my automation envelopes to match item speed changes. Here’s how I solved it using tempo markers.

Why not use the master playrate envelope? Because you won’t see the item and envelopes move and you can’t measure the actual length of the effect in minutes & seconds.

TLDR:

  • track automation doesn’t follow item length if you alt-drag an item edge.
  • if you set the project (or track, or item) timebase to Beats Position Length Rate, the item and automation will respond to tempo changes.
  • insert a tempo marker at the start of the item, use mouse scrollwheel over bpm display to shrink/stretch the item and envelopes.
  • Uncheck Preserve pitch in item properties to have pitch change along with speed changes
  • using stretch markers you can change speed within middle of items

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