This is the initial release of a module that implements Thomson's multi-taper spectral analysis algorithms. The code is based on a subroutine from Lees and Park and has, of course, a python interface. References are provided in the readme file. The code has seen substantial usage and should be fairly reliable. Examples are included. It's available at http://code.google.com/p/pymutt/. Martin L. Smith Blindgoat Geophysics