SenseUPnP: Feedback Thread

[guardajoias]

My experience of the UPnP implementation that came with 3.2 is that while there can be some improvements with some endpoints, and the UI is somewhat simpler, we lost the profiles that worked well with some endpoints. For example, while I was previously able to use a profile for the Oppo 205 that worked rather well, it is now useless. Whether in compatibility or without, Sense loses regularly the Oppo, there is no longer gapless playing whether for local tracks or Qobuz, and in compatibility mode, the playing will not last more than a few seconds. Admittedly, the Oppo 205 has a problematic implementation of UPnP as I do not get good results with the systems I tried: Audirvana and mConnect. So we will have to be patient until Innuos manages to bring back what the profiles where achieving...

 

[SalsaCycle]

I found this regarding newer ND555 from its manual/white paper:
"Streaming from a network, ND 555 is compatible with PCM sampling rates of up to 384kHz and with double-rate DSD (DSD128, sampling rate 5.6448MHz). Because the ND 555’s PCM1704 DAC chips are not DSD compatible, DSD signals are transcoded to PCM within the DSP. First the DSD signal is downsampled to 352.8kHz, 40-bit floating point PCM and low-pass filtered to remove DSD’s noise-shaped ultrasonic quantisation noise. Then it is upsampled to 705.6kHz/24-bit for passing to the DAC stage."
Therefore, even though the Naim 'accepts' DoP it is in fact proceeding to convert to PCM first for the DAC to decode, so it is not playing a 1-bit DSD stream; the Naim still processes as PCM before being converted to analogue. I may be wrong but i believe Chord Electronics DACs have a slightly similar philosophy. Point being; sending DSD creates more work for the streamer because it has to go through more processes to convert it into a PCM signal that it is capable of decoding through its LPCM DAC. Apologies if i have old/incorrect information about the Naim streamer.

DSD on Naim Streamers

Hi somehow I have never really felt that dsd was any better flac or wav… it should be … is Naim converting dsd on the fly … don’t get me wrong dsd sounds good but on my ND555 it just does not sound quite as dynamic.

community.naimaudio.com

 

[SalsaCycle]

Thanks for this info, Stephan. It would seem that DoP is a way to "smuggle" a DSD stream past a digital interface that isn't set up to deal with this format. What the DAC does after this is another problem, for which there are a variety of solutions. For anyone interested, there's a discussion of this at the PS Audio Forum, who are passionate DSD advocates.

Keeping with the spirit of the thread, here is my current experience using UPnP.

Configuration:
Zen Mk3, Sense v 3.2.5
Naim NDS streamer connected to the Zen by ethernet
Compatibility mode off
Display track data on streamer display is off

In this configuration, WAV and FLAC files and Qobuz play fine.
Single-rate DSD files do not play when DSD support is on. The track progress indicator advances approximately 9 seconds and then loops back to the beginning of the track with no sound.
When DSD support is off, DSD files play. While sound quality is acceptable, subjectively, it is poorer than when I play the same track from a flash drive using the USB A port on the front panel of the NDS.

 

[michaelb]

Any other Naim ND555 Atom HE owners having problems with Quobuz occasionally skipping to the beginning of the next track on albums?

It was fine for me until the last two beta versions, but a constant now. Not with every track, but regular enough to be a pain.....

Out of curiosity, I am now using the Statement as a Roon Core controlled by Roon and the skipping seems to have stopped....