MP3
AAC to MP3
Create Short Audio Clips
With fade in and fade out
for i in `seq -w 1 13` ; do sox $i* out/$i.mp3 trim 0:45.0 30 fade h 0:5 0 0:5 ; done
With fade in and fade out
for i in `seq -w 1 13` ; do sox $i* out/$i.mp3 trim 0:45.0 30 fade h 0:5 0 0:5 ; done