Cambridge Audio CXNv2 upsampling everything to 384Khz

[BlackJack]

@Guy_Gampell1

So conclusion to me is that the Sample Rate Conversion “disable” feature is broken

This conclusion is false. As you can see, it’s the CXN (V2) that does the up-sampling (your points 4 and 5). This has nothing to do with Roon and it’s settings. If you use a digital output of the CXN (V2) then this up-sampling is irrelevant (not applied) as it only affects the D/A conversion (analog outputs).

About your point 7: What else do you expect here? The digital inputs of the CXN (V2) support a maximum sample-rate of 192 kHz.

PS: This is common behavior nowadays. Most (any?) of the integrated DAC chips do this (up-sampling to the highest supported sampling frequency before doing the D/A conversion) and offer filters (linear phase, slow roll-off, …) for the user to choose from. Buy a non-oversampling (NOS) DAC if you don’t want that to happen.

See also:

Cambridge 851N question

The up-sampling is a DAC feature. As you don’t use the DAC it seems not to be relevant for your use case. It looks like the digital input signal gets just passed trough to the digital outputs of the 851N. There is usually no conversion done (unless for compatibility reasons?) much as Roon handles it on default settings. I guess that the 851N does not signal the output in use (it most-likely doesn’t know that himself) as the outputs often work in parallel and the user is free to uses which ever o…