-f --format=FORMAT
Sample format
Recognized sample formats are: S8 U8 S16_LE S16_BE U16_LE U16_BE
So, if I understand the man page correctly, then if I run "arecord -t raw -c
1 -f U16_LE -r 8000", then the resulting file will have, basically, raw 16
bit samples, mono, 8000 samples per second, is this correct?
Then, after my processing the raw data, my plan was to use "sox -b 16 -e unsigned-integer filename.raw -o filename.wav" to create a WAV file, am I on the right track? One thing I was not sure of is that sox's man page says that for "-e unsigned-integer" this means that "value of 0 represents maximum signal power". Is this what arecord's "-f U16_LE" produces; I take it that this means that the value of 0x0001 would be the minimum signal power, silence, then increasing up to 0xFFFF, then 0x0000 for the maximum signal power, correct?
What I'm basically trying to do is take an audio sample of some length, then split it into multiple files when there's silence in the audio, with some minimum durations of each file. If there's already some useful tool that can do this for me, I'd like to know, but if not I figure that I can use this approach to try some heuristics to find short stretches of silence in the raw audio, taking into account some background noise.
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