DSD over pcm stopped working

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Amarok
Posts: 4
Joined: Tue Apr 16, 2019 5:58 am

DSD over pcm stopped working

Post by Amarok » Sat Apr 04, 2020 9:01 am

Hi, I update to latest version and now DSD over PCM produces just noise and the music is heard on a very low volume, seems like this is not working anymore.

Everything was working great yesterday, I am on LG V35.

Any ideas?

blaubär
Posts: 1308
Joined: Tue Apr 02, 2019 6:48 am

Re: DSD over pcm stopped working

Post by blaubär » Sat Apr 04, 2020 11:01 am

Are the settings as they were before, e.g. DSD OVER PCM > Volume Control etc ? If yes, contact neutronmp@gmail.com .

RoVo
Posts: 2
Joined: Sun Apr 05, 2020 7:23 am

Re: DSD over pcm stopped working

Post by RoVo » Sun Apr 05, 2020 7:26 am

Same for me on my LG G7 thinq. No setting were changed. No music (not even at low volume) just noise now.
Music can only be heard when I choose to not use dsd over pcm.

Ron

blaubär
Posts: 1308
Joined: Tue Apr 02, 2019 6:48 am

Re: DSD over pcm stopped working

Post by blaubär » Sun Apr 05, 2020 1:01 pm

FAQ: What is DoP (DSD over PCM)?
The original idea for DoP was invented by dCS in 2011. It involves taking groups of 16 adjacent 1-bit samples from a DSD stream and packing them into the lower 16 bits of a 24/176.4 data stream. Data from the other channel of the stereo pair is packed the same way. A specific marker code in the top 8 bits identifies the data stream as DoP, rather than PCM. The resulting DoP stream can be transmitted through existing 24/192-capable USB, AES, Dual AES or SPDIF interfaces to a DoP-compatible DAC, which reassembles the original stereo DSD data stream COMPLETELY UNCHANGED.

If something goes wrong and the data stream is decoded as PCM, the output will be low-level noise with faint music in the back ground, so it fails safely. This can happen if the computer erases the marker code by applying a volume adjustment.
Well, that seems to be the case.

blaubär
Posts: 1308
Joined: Tue Apr 02, 2019 6:48 am

Re: DSD over pcm stopped working

Post by blaubär » Sun Apr 05, 2020 1:38 pm

I could reproduce the effect. Did anybody write to the developer in the meantime ?

blaubär
Posts: 1308
Joined: Tue Apr 02, 2019 6:48 am

Re: DSD over pcm stopped working

Post by blaubär » Sun Apr 05, 2020 6:19 pm

Did this ever work properly ? On Windows I still use the old version 2.13.0, I can enable DoP, I hear sound

dsd-1.PNG
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dsd-2.PNG
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but I don't see "DSD" in the output info, only "PCM" :

dsd.3.PNG
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And I can hear the effects of the DSP, which shouldn't be !

On Android I already have 2.13.1, there I have the noise-effect, and do see "DSD" in the output info :

Screenshot_20200405-201514_Neutron_copy_575x256.jpg
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So the question arises : what did neutron in the old Android-version show in the output info ? PCM ( as in my old Windows-version ) or DSD ( as in my new Android-version ) ? If it was "PCM", then perhaps it didn't really work at all, but converted to PCM anyway ? Does someone remember what it should in 2.13.0 ? And could you use the DSP ? Shouldn't have been possible, if it really worked.

Amarok
Posts: 4
Joined: Tue Apr 16, 2019 5:58 am

Re: DSD over pcm stopped working

Post by Amarok » Sun Apr 05, 2020 6:43 pm

Yes, it used to work great on Android, the perceived difference was notorious, more blacks and more dynamic range with a bit of emphasis on mid range frequencies and more subtle bass.

I writed the developer on Friday, still waiting for his answer.

dmitrykos
Site Admin
Posts: 1847
Joined: Mon Apr 25, 2011 6:15 pm

Re: DSD over pcm stopped working

Post by dmitrykos » Sun Apr 05, 2020 8:27 pm

Hi All,

I confirm that 2.13.1 broke DSD support for LG but it will be fixed by a hot-fix shortly, sorry for that!

Amarok
Posts: 4
Joined: Tue Apr 16, 2019 5:58 am

Re: UPDATE! - DSD over pcm stopped working

Post by Amarok » Sun Apr 05, 2020 11:57 pm

Developer Dimitry sent me a corrected Neutron Dev Version, everything about DOP is fixed, works like a charm.

Thank you Dimitry.

RoVo
Posts: 2
Joined: Sun Apr 05, 2020 7:23 am

Re: DSD over pcm stopped working

Post by RoVo » Tue Apr 07, 2020 5:35 pm

So when can we expect a fixed update on Google Play Store??

Ron

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