I'm trying to use "sox" to mix some audio files.
The command works great on my Mac terminal
sox -m audio.wav "| sox upload.wav -p trim 2 1 pad 6" final.wav
This mixes (not concatenate) audio.wav and a section of upload.wav from the 2nd second to the 3rd second and adds 6 seconds of padding in the front, and outputs to final.wav
Now the problem is, the SAME EXACT command does NOT work my Amazon EC2 RHEL box. (sox is installed correctly). I get the following error
sox soxio: Can't open input file `| sox upload.wav -p trim 2 2 pad 6': No such file or directory
For some reason RedHat doesn't like the double quotes. Even though it is documented to be used this way.
Thanks for your help!