Show similarities of 2 audio files

[lvaleriu]

If we have 2 audio files A1 and A2 which could be drawed as following :
A1 : XXXXXYYYYZZZZZZZZZZZZZZ (where XXXXXXXXX, YYYYY, ZZZZZZZZZZZ indicate 3 audio regions of differents lengths)
A2 : SSSSSSSSSYYYYYTTTTTTTTT (where SSSSSSSSSS, YYYYY, TTTT indicate 3 audio regions of differents lengths)

then we could call a similarity fonction which will tell us that A1 and A2 have a "similar" region of length N seconds which starts at time t1 in A1 and t2 in A2.

For the moment I'm working myself on this, but feel free to help/contribute if you wish.

Thanks,
Valeriu