Old 02-15-2020, 02:24 AM   #1
Glubber
Human being with feelings
 
Join Date: Dec 2007
Posts: 188
Default Stretch causing clicks and Inaccurate waveform

Step 1) Import sine.wav file to empty track.
Step 2) Split item at zero-crossing.
Step 3) Slightly time-stretch the left half of item, using left edge.



Result (above): Audible click at split point, even though wave form looks perfect.

Step 4) Glue 2 items back together.
Result: The waveform updates to show the cause of clicking:



I tried all the different stretch algorithms in Project Settings, same result. Is this inevitable, because play-rate must change in order to stretch? When I try a similar process using stretch markers instead of splitting the item, I get similar artifacts. I have selected "Tonal-optimize" under Project settings. Crossfading doesn't fix this. Forgive my ignorance.
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