View Full Version : M4A to MP3 - Chipmunks!

2007-10-17, 08:32
I have a number of m4a files that stream to softsqueeze using these commands (for wav or mp3):

mov mp3 * *
[faad] -w -f 1 $FILE$ | [lame] --resample 44100 -x --silent -q $QUALITY$ -b $BITRATE$ -r - -

mov wav * *
[faad] -w -f 1 $FILE$

This works fine for some files with 44.1 kHz rates but when faad shows the rate for some files as 22050 Hz the output for mp3 sounds like a chipmunk with the audio at double speed!

If I stream directly as WAV, the 22050 Hz file plays fine.... is there some limitation on what lame expects as the rate on a file from stdio being piped from faad?

Any thoughts would be appreciated. Thanks!

2007-10-19, 14:49
Nevermind - I figured it out....

.. I was ripping a stream at 22k rate using mplayer. Using -srate in mplayer I can force 44k and the chipmunks are gone!