Comments

musicvid10 wrote on 3/16/2011, 11:34 AM
Start with Google Images, and Wikipedia. But it's not quite as simple as you make it sound.

http://en.wikipedia.org/wiki/Musical_temperament
http://en.wikipedia.org/wiki/Equal_temperament
http://en.wikipedia.org/wiki/Well_temperament
http://en.wikipedia.org/wiki/Piano_tuning

The tempered scale is an imperfect art, and there are many tuning models in existence, going all the way back to the late 17th century. There are half a dozen or so tuning matrices used in modern piano tuning. They can vary by a few to many cents (hundredths). That's significant.

A controversial method, called Lucy Tuning, is based on pi, and has received lots of attention, but relatively little acceptance in music circles.
jbolley wrote on 3/16/2011, 3:23 PM
http://showmeprotools.com/wp-content/uploads/2008/downloads/pitch_vs_frequency_graph.pdf
Geoff_Wood wrote on 3/16/2011, 3:53 PM
As simple google search for 'instrument note frequencies" found this useful one, though it only relates to the 'fundamental' frequency of those notes.
http://www.contrabass.com/pages/frequency.html

Possibly more relevant, searching "instrument frequency bandwidths" threw up many too, including this one :
http://www.recordingwebsite.com/articles/eqprimer.php

Google is your friend, and a little experimenting with query phrasing and keyword choice can narrow results done to what you need.

geoff