From: "Michael McInnis" <>
>
> One interesting test of a sample rate converter is to sample align the
> original waveform and the converted waveform on two tracks of a DAW and
> invert the phase of one of the tracks and create a mix. The resulting fi=
le
> shows the artifacts of the conversion process and may help with the
> evaluation of any conversion software. Along with frequency based
> anomalies, there are often temporal displacements as well.
>
> Forgive me if this has already been mentioned.
With the original sample at one sampling frequency and the converted one
at a entirely different frequency the inversion cannot be done in any
kind of meaningful way. Sample alignment will occur at only one point
and the timelines will diverge rapidly if compared on a sample by sample
basis as implied. Convert one to the same frequency as the other and you
are testing two conversions, not one. Send them both through D/A's and
you are also testing differences in the two D/A's processes.
Remember at the start of this thread we had a original containing 48,000
samples per second, and a converted file containing 44,100 samples per
second. Sample aligning those two is going to be interesting, to say the
least.
Walt
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>From Tue Mar 8 18:27:13 2005
Message: 6
Date: Mon, 10 May 2004 07:32:48 -0700
From: Doug Von Gausig <>
Subject: Re: Re: how high will a mic go?
The high-freq. mic discussion makes me wonder what recorder we are going to=
use for these high freqs, since most these days are limited to about the
human hearing range...
Doug
***************************************
Doug Von Gausig
Digitally Recorded Birds Sounds at:
http://naturesongs.com/birds.html
Clarkdale, Central Arizona, USA
34=B046.34N 112=B003.25W
e-mail:
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