Sonic Visualiser

v3.0.3 is available on http://sonicvisualiser.org/download.html

More trouble than I care to bother with since it's not ready-to-use.

From the dev's site:
"Don't forget your plugins!
Analysis plugins: Oh yes, you'll want some of those. Go to the Vamp plugin download page.
No plugins are included with Sonic Visualiser itself."

v3.0.3 is available on http://sonicvisualiser.org/download.html

More trouble than I care to bother with since it's not ready-to-use.

From the dev's site:
"Don't forget your plugins!
Analysis plugins: Oh yes, you'll want some of those. Go to the Vamp plugin download page.
No plugins are included with Sonic Visualiser itself."

Version 2.4.1 is available from the developer's site.

A superb application for the musician. It will do everything that the paid music analysis apps do - and for free. Very powerful. And with the available plug-ins permits such procedures as chord analysis, beat and bar tracking, as well as slow-down, pitch change...in fact it really can do most anything a musician wants

Sonic Visualizer 2.0 (which is just a maintenance release, despite it’s major version increment) has been available since July. You can download it from here: http://www.sonicvisualiser.org/download.html .

This is a must have bit of software for any music theorist that wants to indulge in some of the same sonic analysis of music that Robert Cogan came up with some years ago. Being freeware is also remarkable too

This is AWESOME. Wonderful sound, amazing capabilities, what else can you ask for FREE?? I recommend this instead of paying for commercial slow-down practice software, it does that and more. Works with LADSPA and VAMP plugins, can save in all sorts of ways. See waveforms, loop sections, etc. etc. opens mp3 and other file formats... Everything for me works great except crashing during one 3rd-party plugin, so I just don't use that one.