Upsampling yes or not?

Support
#1

Roon Core Machine

Synology DS220+ DSM 7

Connected Audio Devices

Cambridge CNX v2>coaxial>Chord Qtest>analogic>Denon AVR7200WA

Description of Issue

Hi, I’m a newbie and I don’t understand something about upsampling. In Roon, the configuration DSP>sample rate conversion of my device CNX is ‘disabled’. But the path says ‘88.2kHz to 384kHz’. What does this mean ? Thanks in advance for explanation.

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#2

If Roon DSP is not set to upsample, it means your Cambridge is. Looks like it’s upsampling to max rate of 384kHz.

#3

Reading available info on the net would have answered your question…

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#4

I think your avr converts analog back to digital and resamples everything to 48k if you use audyssey, for whatever that’s worth.

#5

Thought I read somewhere that the CXN upsamples everything to 384.
Which is what your signal path shows, its after the CXN, its not Roon upsampling.

1 Like
#6

Yes, you did. Two post up.

#7

Thanks Jim. I agree, but the fact is that my Chord gets 88,2kHz (according the color of the led and I trust it).

#8

Can’t answer that unless the Chord is set for that. IDK. I just answered your original question.

#9

Thanks SJBubba. On the AVR, I only use the Pure direct mode (passtrough) for music. Otherwise, the DSP of the AVR will change all the sound, you’re right.

1 Like
#10

You can trust Chord’s LEDs, since the Cambridge’s digital out isn’t upsampled (only analog out is!) and you’re not taking advantage of it’s “unique ATF2 technology”…
S/PDIF coax can’t handle anything beyond 192kHz, optical beyond 96kHz, anyway.

Signal path: bit depth and sample rate converted many times. Is it normal?
#11

Thanks Marin. That’s it:

  • upsampling 88.2kHz to 384kHz only works on CNX’s analog output.
  • the coaxial output is passthrough (no upsampling). It’s fine. It’s what I want to use the capabilities of the Chord DAC as purely as possible.
  • Roon does not know which output is used on the CXN. It only shows a theoretical rate.
#12

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