audio - Finding number of samples in a .wav header -

the wav file has header (44 bytes). in header specified sample rate of signal, number of channels , on, number of samples audio file. need know can find number of samples information in header.

what formula.

starting @ 40th byte next 4 bytes (little endian) subchunk2 size. can deduced formula:

subchunk2size = numsamples * numchannels * bitspersample/8 

numchannels start @ byte 22 , 2 bytes (little endian) in length. bitspersample start @ 34th byte , 2 bytes (little endian) in length. replacing these can numsamples number of samples.

for example: if subchunksize2=2048, numchannels=2 , bitspersample=16, 2048 = numsamples * 2 * 2 numsamples=512

a read here.