The audio/shntool port
shntool-3.0.10p1 – multi-purpose wave data processing utility
shntool is a multi-purpose WAVE data processing and reporting utility.
File formats are abstracted from its core, so it can process any file
that contains WAVE data, compressed or not - provided there exists a
format module to handle that particular file type.
shntool has native support for .wav files, and can work with other
lossless audio formats, provided the appropriate helper program