Trying to speed up audio makes all the t's and s's really sharp. I have no idea how to fix it. How do I dull them down?
ffmpeg -i input.mp3 -filter:a "atempo=2.0" -vn output.mp3
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See https://superuser.com/q/1118826 – Gyan Mar 16 '20 at 17:36
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Also https://superuser.com/a/1132229/ & https://superuser.com/a/611927/ – llogan Mar 16 '20 at 21:51