[linux-audio-user] Analysis software?

[Paul Winkler]

Hi folks,

I'm looking for something that can take soundfiles
and display various analyses of them. Any recommendations?
Something very much like what you can get with Spectralab, for example
these plots:
http://www.pcavtech.com/soundcards/ht1869/index.htm
... but free software and working on linux :-]

Basically the main thing I need is a good display of 
log frequency vs. dB amplitude, averaged over the whole file,
useful for e.g. getting a frequency response from a swept sine wave
or white noise.

Other analyses that would be handy at various times:
signal to noise ratio and total harmonic distortion
given a known input.

Also really nice would be a clearly labelled sonogram
showing log frequency against time.

So far I've been using snd, which has a decent sonogram but kinda falls
down on readability: e.g. it doesn't display the actual frequencies of
the scale if you select log frequency, it's just 0 to 1.0 so I have
to guess, or click on a part of the graph to find out about that
particular spot.

-- 

Paul Winkler
http://www.slinkp.com