envelope - generate amplitude envelope track of speech waveform
(-i item) (-w windowsize) (-h) (-d) file
produces a smoothed amplitude envelope of a speech pressure waveform
as a track item at the same sampling frequency.
The envelope is calculated from the sum-squared sample values in
a given window. The window is supplied on the command line. A rectangular
window is used by default, but a hamming window is an option.
and their meanings are:
Identify program and exit.
Select input item number.
Specify the envelope window width in seconds. Default 1ms.
Use hamming window. Default rectangular.
Output in dB (10log10(envelope)).
Any speech waveform.
1.0 - Mark Huckvale.
Fri Jul 09 14:54:34 2004