This trick reminds me of "OpenAI charges by the minute, so speed up your audio"

https://news.ycombinator.com/item?id=44376989

Which worked great. Also, cut off silences.

> One half interesting / half depressing observation I made is that at my workplace any meeting recording I tried to transcribe in this way had its length reduced to almost 2/3 when cutting off the silence. Makes you think about the efficiency (or lack of it) of holding long(ish) meetings.