On 8/6/2013 8:15 PM, Marcus D. Leech wrote: > 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. > > > so when is it more appropriate to use a rational resampler vs a polyphase arbitrary resampler vs a fractional resampler vs a fractional interpolator ? Does the processing load differ grately between them?
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