Tim Krief on Nostr: Olive editor 0.2 (it's dead but you can still find appimages) had perfect 2 time ...
Olive editor 0.2 (it's dead but you can still find appimages) had perfect 2 time speed audio playback but it also did not use MLT as a backend, so I'm starting to thing that the issue is with MLT. (Also there's nothing in Kdenlive codebase right now that handles playback, it's all being done by MLT)