[linux-audio-dev] Measuring playback and capture quality.

[James Courtier-Dutton]

Hi,

Are there any linux tools out there that will sample the line in, and 
display a detailed spectrum scope of the detected sound?

E.g.
http://www.pcavtech.com/soundcards/ct462048/SNR_LB_FS.gif

Eventually I wish to send a test signal from one sound card to another 
and compare the frequency response/noise etc. of the line input of the card.

James