Le 11/05/2011 10:04, Invisible a écrit :
> On 10/05/2011 20:15, Alain wrote:
> 
>> Maybe that the original recording was done in a lossy format, or even a
>> non-lossy format but with a sample rate set to low and a sample
>> resolution also to low... Like 4000 kHz (or even less), 4 bits...
>> (I had a single CD that contained the whole Beatles discography encoded
>> as .wav at that level or about...)
> 
> A normal CD is 40 kHz, so 4000 kHz would be 10x *higher* resolution than
> normal. And 4 bits per sample would be almost unrecognisable.

CD is 44.1kHz, dual channel, 16 bits per sample (linear PCM).

I guess Alain was thinking of a recording at 4000 Hz.

4 bits sampling does in fact exist, but not in CD format, rather as
adaptative delta encoding (I used to have such hardware which could
record & play sound using only 4 bits per sample. All the smart was in
the chip)
Transforming a capture into a CD-style wav file is something I never
succeed to achieve.



-- 
Software is like dirt - it costs time and money to change it and move it
around.

Just because you can't see it, it doesn't weigh anything,
and you can't drill a hole in it and stick a rivet into it doesn't mean
it's free.

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