SoX (Sound eXchange; it's in the Pandora Repo) can do a lot of things, for example:
When you run it it drops you in a shell, from there, you must first export some environment variables:
export LD_LIBRARY_PATH=`pwd`/lib
export PATH=$PATH:`pwd`/bin
export SOX_OPTS="--buffer 4096 -q"
Now try to...