Sun OS 4.1 audio tools?

[Ken Kahn]

I'm looking for Sparc station audio tools like Jef Poskanzer's set of
audio filters.  But it would be nice if they understood the audio headers
on 4.1.  In particular I'm interested in mixing, changing pitch,
concatenating, and altering the speed.  I need them in the style of Unix
filters rather than an interactive program.

Any leads would appreciated.  Thanks in advance.

  -ken kahn (kahn at parc.xerox.com)