On Mon, 26 Feb 2018, Ricard Wanderlof wrote: > On Fri, 23 Feb 2018, Muni Sekhar wrote: > > > [ Please keep me in CC as I'm not subscribed to the list] > > > > I?m using an alsa utilities(aplay & arecord) for sound loopback > > testing. From Linux host , sending & receiving the wav file. > > > > At end I want to compare the sent & received wav file. Does Linux has > > any utility to support this one? > > If the wav headers are identical, you can just use cmp or diff. Otherwise, > you can extract the raw audio using sox, which gives you files with just > the audio samples in them, and then you can use cmp or diff to compare > them. It won't work though if the files aren't actually identical, for > instance if there is an offset of a couple of samples in one compared to > the other. > > If I had to compare two wav files which were offset by a small number of > samples, I'd open them in Audacity, manually align them, then sum the > result, write to a new file and verify that the file just contained zeros. (Sorry, pressed enter a bit too fast there)... ... align them, _invert_one_of_them_, then sum the result, write to a new file and verify that the file just contains zeros. /Ricard -- Ricard Wolf Wanderlöf ricardw(at)axis.com Axis Communications AB, Lund, Sweden www.axis.com Phone +46 46 272 2016 Fax +46 46 13 61 30 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
