pitch analysis software

Here is very professional software for any kinds of sound analysis, called
PRAAT by Paul Boersma.
Its origin is in phonetic analysis.
Concerning the pitch analysis of the chinese flute mentioned in one of the
last digests I can only recommend the use of this software.
It has a very powerfull pitch-analysis-module.
The best : Its completely free and available for all platforms!!!!

Take a look at http://www.fon.hum.uva.nl./praat

Reinhard