mp3

Changing sound volume or bitrate of mp3 files with lame

By jeltsch on Wed, 05/23/2007 - 22:35

Sometimes the recording level of mp3 files is very low. If I do some jogging next to a busy road, I cannot hear anything even when the sound volume is on the max. Therefore I have to increase the volume of the mp3 file. Using lame you can do it with the following script:

#!/bin/bash
while [ $# -ge 1 ]; do
infn=$1
outfn="${infn%%.mp3}_3x.mp3"
echo $outfn
lame --mp3input -v --scale=3 $infn $outfn
shift 1
done

Re-encoding mp3 files into smaller files with lame

By jeltsch on Tue, 03/06/2007 - 22:33

My old mp3 player broke quite a while ago and now I am using a very primitive one that has only 128 MB and which refused to play some mp3s. In order to fit more podcasts into the memory and to play back those unplayable mp3 files I re-encode them with lame:
lame --mp3input -V 3 --strictly-enforce-ISO --resample 12 original.mp3 reencoded.mp3

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