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Steinar Bjaerum
2005-02-25, 08:34
Hi.



Has anyone verified that the digital out on Squeezebox (with fixed digital
output level) is bit-correct?

I am thinking about playing an uncompressed WAV, recording the signal at the
digital output and comparing the recording with the original WAV.



Is such a test part of Slimdevice's test procedure?



If the output is bit-correct, the Squeezebox could serve as a high-end
"transport" when connected to an external DAC.

(Assuming the DAC is robust with respect to jitter.)



Steinar

momerath
2005-02-25, 08:39
Various sources (who I'm too lazy to look up) have claimed that it is
or I wouldnt have bought one. However, if you want to test it more
easily than the method you suggest, you should find a 44.1K dts sample
and send it to a home theater receiver. You can find such a sample by
searching for "bit-perfect test" on head-fi.org. If it plays
normally, the output is bit-perfect.

Michael Peters
2005-02-25, 12:14
On Fri, 25 Feb 2005 16:34:03 +0100, Steinar Bjaerum <steinar.bjaerum (AT) online (DOT) no>

>
> I am thinking about playing an uncompressed WAV, recording the signal at the
> digital output and comparing the recording with the original WAV.
>
>

Be careful when you are doing so - a lot of sound cards will resample
digital input.
AC97 cards do, for example (or so I've been told)

I believe M-Audio Audiophile 2496 does not, I don't know about their
other models.
Again, that is what I've been told. I have not done any testing
myself, mp3 at 192VBR is good enough for me (though I do archive
lossless in flac).

--
http://mpeters.us/

Michael Peters
2005-02-25, 12:14
On Fri, 25 Feb 2005 16:34:03 +0100, Steinar Bjaerum <steinar.bjaerum (AT) online (DOT) no>

>
> I am thinking about playing an uncompressed WAV, recording the signal at the
> digital output and comparing the recording with the original WAV.
>
>

Be careful when you are doing so - a lot of sound cards will resample
digital input.
AC97 cards do, for example (or so I've been told)

I believe M-Audio Audiophile 2496 does not, I don't know about their
other models.
Again, that is what I've been told. I have not done any testing
myself, mp3 at 192VBR is good enough for me (though I do archive
lossless in flac).

--
http://mpeters.us/