SUMMARY When speeding up playback (for example with the >> icon underneath the Project Monitor, or hitting the 'L' key), audio is severely distorted. It seems to have a static noise and tiny skips. STEPS TO REPRODUCE 1. Start playing a video in the timeline 2. Increase the speed to 2x using the 'L' key 3. Listen to the audio OBSERVED RESULT Audio plays back with static and skips. It seems particularly bad with voices speaking. EXPECTED RESULT Audio plays back correctly. IMPACT This makes editing long videos more difficult, because it's hard to watch them back quickly to either find the most important parts or identify parts that need editing. SOFTWARE/OS VERSIONS Kdenlive: Kdenlive Version 22.04.3, using MLT version 7.8.0 OS: Ubuntu 20.04.5 LTS ADDITIONAL INFORMATION - This has been noticed by others since 2018, but I couldn't find a formal bug report: https://forum.kde.org/viewtopic.php?f=279&t=151473 - This has also been recorded in other bugs, e.g. https://bugs.kde.org/show_bug.cgi?id=455563 (which you can hear the static in when it is at 2x speed) - It's clear Kdenlive can play back videos at a faster rate without this static effect: using the 'Change Speed' dialogue with Pitch Compression gives the desired result. - Demonstration here: https://youtu.be/09h__B7XhpU