[LAU] Editing sound via shell

[Daniel Yokomizo]

Hi,

    I tried to find some tool to edit sounds using the shell (basic
things like changing volume, tempo, etc., nothing too fancy) but I
failed to find something other than Rubber Band (which I'm having
trouble making work, I'm on 64bit Debian btw). I usually just use
Audacity for this stuff but now I have a large number of files to edit
and scripting is the best choice.
    Is there any other good tool for this task?

    Best regards,
    Daniel Yokomizo