I'm trying to write a script that takes off the first 11 seconds from more than 100 mp3 files.
Can I use the "split" command to do it? Or is there any Mac CLI program that I can use?
Try ffmpeg.
ffmpeg -i infile.mp3 -ss 11 outfile.mp3
In case your ffmpeg does not support mp3 encoding, try below:
ffmpeg -i infile.mp3 -ss 11 /tmp/outfile.wav
lame /tmp/outfile.wav outfile.mp3
You will need to install these packages though :)