New subject: Converting binary digital data in PCM

11 Dec 2010

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 &lt;lau(a)kudla.org&gt;

...
  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

Re: [LAU] Converting binary digital data in PCM