Convert files for atari STE background playing: see http://atari.8bitchip.info/STEbap.html

ste_convert.sh

#/bin/sh

# if no parameter is passed, consider we want to convert mp3 files
test -n "$1" && EXT=$1 || EXT=mp3

#remvove spaces and funky characters in file names
detox *.${EXT}
#shorten file names to follow FAT 8.3 convention
rename -v "s/(\S{8}).*/\$1.${EXT}/g" *.${EXT}

for F in *.${EXT} ; do

	CURRENT_NAME=$F
	FUTURE_NAME=$(basename $CURRENT_NAME .${EXT})
	echo processing $CURRENT_NAME
        # -ar set audio sampling rate to 50066 Hz
        # -c:a pcm_s8 convert to signed 8 bit PCM
        # -map_metadata -1 strip metadata from file (like artist name)
        # -f au to force AU file format since we use wae filename extension

	avconv -i $CURRENT_NAME -ar 50066  -c:a pcm_s8 -map_metadata -1 -f au $FUTURE_NAME.wae 2>/dev/null

done