On Sat, 25 Apr 2009 21:41:14 GMT, "Brian Gaff"
wrote:

Why not use a test cd with some frequency sweeps on it?

You can also download test tones from the web to burn on to a CDR. Try
this one: http://www.realtraps.com/test-cd.htm

Best used with a sound level meter or other measurement device.

Kal