[LAD] Problems with time-scaling on records

Hi! My name's Álvaro, from Barcelona [it's my first post to this list, so I say hello :) ]. I'm dealing with some issues with time-scaling and I'm a little bit lost trying to find the problem. I'm trying to record an analog audio input using *arecord*, in order to do some fingerprinting (features extraction). The problem is that after every reboot of the recording machine, the record has a different time scale so, as the fingerprint algorithm works with the relative position of energy peaks for different frequencies and the time them happen, the algorithm sometimes works, but sometimes fails. Could you give me any guidance to know where to search a possible solution for the time-scaling issue? Thank you very much in advance! Álvaro --- Forza saluti a tutti bacioni auguri in boca di lupo arrivederci ea presto pino