aspectralstats
Display frequency domain statistical information about the audio channels. Statistics are calculated and stored as metadata for each audio channel and for each audio frame.
It accepts the following option:
- win_size
Set the window length in samples. Default value is 2048. Allowed range is from 32 to 65536.
- win_func
Set window function.
It accepts the following values:
- ‘rect’
- ‘bartlett’
- ‘hann, hanning’
- ‘hamming’
- ‘blackman’
- ‘welch’
- ‘flattop’
- ‘bharris’
- ‘bnuttall’
- ‘bhann’
- ‘sine’
- ‘nuttall’
- ‘lanczos’
- ‘gauss’
- ‘tukey’
- ‘dolph’
- ‘cauchy’
- ‘parzen’
- ‘poisson’
- ‘bohman’
- ‘kaiser’
Default is
hann.- overlap
Set window overlap. Allowed range is from
0to1. Default value is0.5.- measure
Select the parameters which are measured. The metadata keys can be used as flags, default is all which measures everything. none disables all measurement.
A list of each metadata key follows:
- mean
- variance
- centroid
- spread
- skewness
- kurtosis
- entropy
- flatness
- crest
- flux
- slope
- decrease
- rolloff