[LAU] Converting binary digital data in PCM

[ciclo esano]

Hmmm.. I have no success until now :(

Using play -e raw -b 32 -c 1 -r 441000 --endian little dat.raw
I am facing with the following error:

play FAIL sox: --encoding: `raw' is not one of: signed-integer,
unsigned-integer, floating-point, ms-adpcm, ima-adpcm, oki-adpcm,
gsm-full-rate, u-law, mu-law, a-law.

That's strange. I am sure the data are in little-endian format (since the
storage CPU is Intel), each sample is 32-bit long integer, I have 32768
samples but have no idea about the real sampling rate.
I can try with several speeds, but the question about the "encoding" still
unclear for me. And this is the same using sox instead.


So, I am stuck here


2010/12/11 Rob <lau at kudla.org>

> On Saturday 11 December 2010 04:42, ciclo esano wrote:
> > Moreover the information about bit rate, channel and everything
> >  concerning audio file is very difficult to apply here, since the raw
> >  data are coming from a digitizer after several downsampling processes
> >  to have all the signals in the audio range (in fact they arise from the
> >  high frequency of nuclear spins, hundreds of MHz)
>
> Oh, that sounds brilliant.  Well, if they're being downsampled already,
> surely you know what frequency to choose, but if not, you could just start
> with the common ones (22050, 32000, 44100, 48000), see how they sound and
> tweak as needed.  I'd assume it'd be one channel and 32-bit samples based
> on what you said, but you can experiment with that too.
>
> Rob
>
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