seanadams wrote:
then upsample it to 0,0,0,0, 2,2,2,2, 3,3,3,3 at four times the rate.
No, it interpolates. So you get something maybe like: 0, 0.5, 1, 1.5, 2
and so on.
Thanks for the clarification.
What you're talking about is oversampling - just another name for
upsampling, but usually used in reference to what modern DACs do
internally. It is fundamental to how they work and yes, the smaller
steps require less filtering (and yield better linearity, lower noise
etc). The DAC in transporter oversamples by 128x, so a 44.1 signal is
actually converted to analogue at a sample rate of 5.6 MHz... a high
resolution indeed.
So it is more than twice as good as the SACD single bit rate of 2.82
MHz, eh? Any chance that the DAC in the Transport actually is 5.64 mHz?
Now, what's stupid is taking 44.1 CD rips, resampling them to 96KHz and
then re-saving to disk, thinking you've "given it more breathing room"
or "opened up the high end" or whatever. It's total nonsense, exactly
like on CSI where they zoom in on a single pixel, click "ENHANCE" and
then read a license plate from a mile away. It don't work that way.
Next you are going to start claiming that little wooden feet that hold
your cables off the floor don't improve the bloom and remove a veil.
More seriously, I don't understand why anyone thinks 96kHz is a good
thing to do to RedBook. For ADAT sources, sure. But taking it to a
non-integer multiple makes no sense. If nothing else, it will screw up
the dither.
--
Pat
http://www.pfarrell.com/music/slimserver/slimsoftware.html
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