How to compute wave file length and sample number

Microsoft WAVE soundfile format

https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

How to compute SampleNumber according to FileSize(byte)

SampleNumber=(FileSize-44)/(NBITS/8)

WaveLength=SampleNumber/SamplingFrequency

NOTE:

NBITS:

the number of bits per sample (NBITS) used to encode the

data in the file, which can be get via MATLAB command: wavread