converted audio to wrong signedness, fixed

convert.sh

@@ -7,7 +7,7 @@ fi
 
 TMPFILE="convert.tmp"
 
-ffmpeg -i ${1} -f s16be -ar 16k -ac 1 -acodec pcm_s16be ${TMPFILE}
+ffmpeg -i ${1} -f u16be -ar 16k -ac 1 -acodec pcm_u16be ${TMPFILE}
 SIZE=$(( $(stat -c "%s" ${TMPFILE}) / 2 ))
 echo -ne "\0$(printf %o $(($SIZE % 256)) )\0$(printf %o $(( ($SIZE / 256) % 256)) )\0$(printf %o $(( ($SIZE / 256**2) % 256)) )\0$(printf %o $(( ($SIZE / 256**3) % 256)) )" | cat - ${TMPFILE} > ${2}
 rm ${TMPFILE}