Paul Howarth wrote: > $ for i in *.wav; do sox "$i" -r 44100 "output_$i"; done Yow nice one! Never knew for could do that directly. When I lack knowledge, I know it is time for a dirty hack. for i in `ls *\ * | tr ' ' \|` ; do j=`echo $i | tr \| ' '` ; sox "$j" -r 44100 "output_$j"; done -Andy