3 ms·
"93.75kHz and 46.875kHz are the sampling frequencies Bruno Putzeys uses in all his digital products for Hypex, Grimm audio, KII, etc.", as outline here[0], for
by MrBuddyCasino 3y ago
"93.75kHz and 46.875kHz are the sampling frequencies Bruno Putzeys uses in all his digital products for Hypex, Grimm audio, KII, etc.", as outline here[0], for the following reason:
5.2 Clock
The clock circuit is the same as that used in the CC1
except that the sampling rate is set to 93.75kHz instead
of one of the more traditional audio rates. This is specifically
done to improve the performance of the SRC chip.
An uncommon clock frequency reduces the odds that mix
products between the incoming clock and the internal
clock fall inside the PLL loop bandwidth of the SRC.
[0] https://www.audiosciencereview.com/forum/index.php?threads/why-93-75-khz-sampling-rate.4309/#post-98746 https://www.audiosciencereview.com/forum/index.php?threads/w...
- driggs 3y agoOK, you've pasted from the #1 Google result after searching for "46.875 kHz samplerate". What does this have to do with the Teenage Engineering EP-133? It doesn't have USB audio or SPDIF, so no standard samplerate clock to conflict with.
- MrBuddyCasino 3y agoIt does have DACs, that presumably operate at the standard frequencies.
- driggs 3y agoThe ADC and DAC operate at 46.875 kHz, its samplerate. That's the entire point of my original comment about it being nonstandard.
- CamperBob2 3y agoThe thing is, if the sample rate matters with respect to anything other than the Nyquist limit, your filtering isn't good enough. Relying on spacing between sample clock harmonics to keep beatnotes out of the passband isn't great engineering practice. I have to do that in a relatively-exotic RF application, admittedly, but I wouldn't advertise it as a feature. :) And I'd never choose that approach at audio frequencies. There's just no need.
- driggs 3y agoThe concern isn't about the trivial difference in Nyquist frequency, it's about aliasing and dithering when importing/exporting/synchronizing digitally. 1 sample from the EP-133 is 1.0629251700680271 samples at 44.1kHz, or 0.9765625 samples at 48kHz. (But, again, it doesn't export/synchronize audio digitally, so it probably only matters if directly importing samples.)