dsdreamer;466679 Wrote: 
> Inspired by the latest Stereophile issue and the Ayre USB DAC, I was
> wondering why not create a custom-convert file to do antipodal filtering
> as part of an upsampling scheme to 96kHz. The idea would be to eliminate
> some of the pre-echo artifacts on 44.1kHz recordings. This would only be
> useful for the Transpoter or Touch. Does this idea sound worth pursuing?

Thanks for the correct spelling.  I found this
http://www.aes.org/e-lib/browse.cfm?elib=13285 (from Wolfson), among
other links.

However, now that I re-read your original post, I see that you want to
reduce the pre-echo artifacts on 44.1 recordings.  I'm not sure that's
possible.  It's a little like removing echo from a recording -- you need
to know the impulse response you're trying to remove before can get
anywhere.  Surely, and 44.1 recording you have has *many* impulse
responses, one for each microphone, recording track, processing step. 
There's no way to fix that.

-Caleb


-- 
ccrome2

Caleb Crome
Sr. Hardware Engineer
Logitech SMBU  (i.e. the Squeezebox people)

<B>The future is here.  It's just not widely distributed yet.</B> 
<I>-William Gibson</I>
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