[pHash-support] minimum length of audio samples ?

[Robert Wörle]

Is there a minimum length for audio samples to be hashed ?

I am playing around with some drum samples i made and tryed to match 
different snare drum hits to each other.
Of course a single snare drum stroke would be less then a second in 
duration.

I compiled all well , as i can use the test_audio example on normal mp3. 
but as soon is i use it on my samples i get errors like
dir: quelle/ 1
dir: ziel/ 1
intra distances
***************
file1: quelle//snare1-double.wav
file2: ziel//snare2-double.wav
unable to calc distance
pause - hit any key


inter dists
***********
file1: quelle//snare1-double.wav

I am really keen to use phash for a nice software i am planning but it 
would be crucial to be able to compare very small length of audio 
samples ..
500ms or even less !!

Regards Robert