On 08/06/2013 09:07 PM, Stephen wrote:
I tend to use the fractional interpolator--you can get exact rate
matching that way. It doesn't seem that expensive, particularly when I
use it at the
"low speed" part of the graph near the audio subsystem.
I tried that and it worked. But it adds a small amount of hiss. I also
tried the fractional resampler. It added a lot of hiss and a high pitch
whine. The polyphase arbitrary resampler added a more hiss than the
fractional interpolator but less than the fractional resampler.
stephen
If you're downsampling, you do need to make certain that the bandwidth
of your incoming signal (regardless of its rate) is appropriate for
the final bandwidth after the resampler.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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