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From: Jonathan H <>
Subject: Tempo operates on files very slowly. Is there a quicker way?
Date: Thu, 28 Mar 2019 16:20:20 +0000
Message-ID: <> (raw)

Example 13 minute vbr mp3 file:

mp3 > mp3 = 18 seconds conversion time
mp3 > mp3 tempo -s 1.5 = 27 seconds conversion time

While I love Sox very much and I appreciate that there's more
processing to do with "tempo", I've got a LOT of files to time-squeeze
and I was wondering if there was a faster way of doing this?
Happy to use another tool for this (Ubuntu). I found "soundstretch"
but that just does wav > wav.
I know I could use something like but that's mp3 > wav >
soundstrech > wav > mp3.

Many thanks.

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