I noticed that although my previous post about 24/32 bit with
handling by aplay with wave files was left with no reply, 32-bit
support has indeed been written into aplay's wave init code, in
the late CVS versions.
It must be possible to also include 24-bit sample width ability
into aplay/record. While 32-bit would suffice as far as
quality goes, (8 LSB's zero padded) the 24-bit (3 byte) format,
while possibly a bit more unwieldy (no 24-bit data type) yields
a file which is close to 25% smaller than that of 32-bit.
My docs say:
If your ADC produces a sample point from 9 to 16 bits wide, a sample
point should be stored in a WAVE as a 16-bit word (i.e., signed short).
If your ADC produces a sample point from 17 to 24 bits wide, a sample
point should be stored in a WAVE as three bytes. If your ADC produces
a sample point from 25 to 32 bits wide, a sample point should be stored
in a WAVE as a 32-bit doubleword (i.e., signed long). Etc.
So, having a 24 bit ADC/DAC in my Delta44, I have interest in this.
Thanks, very much.
Tobiah
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