Distorded sound with Tidal


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Sorry for the long post (and for English mistakes, I normally speak French) - If anyone can help me with my technical issue it would be very appreciated! But since this community shows an extraordinary level of knowledge, I am taking my chance!  I tried posting my problem on ROON forum with no success.

ISSUE DESCRIPTION. When streaming Tidal on my system, on some tracks I hear some disturbed trebel (let say in the area of 4KHz +/- 1KHz). It is difficult to describe - it reminds me the sound of dirty (dust) needdle playing a record. For example, I hear that crysp on Ella high notes. I also hear it on some cymbals (rides, for example). Sometimes it is more obvious; sometimes it is subtle.

PATTERN. I have not been able to identify a pattern on when it happens. It could be on 16/44, on 24/192, and everything in between. It seems more frequent on MQA (what ever the resolution). Week ends, week days, day time, night time, none seem to have influence (I was thinking power grid pollution)

EQUIPMENT

Tidal HIFI + FLACs on hard drive
NUC I7 (7th) with ROCK/ROON, USB connected to:
IFI micro I-Link USB to S/PDIF converter (24bits/192KHz capable), connected to S/PDIF of:
Audio Alchemy DDP-1 (Preamp and DAC + external power supply), driving A and B:
A: Audio Space AS-3I (tube amp EL-34) integrated amp that drives Reference 3A MM speakers
B: MiniDSP (low pass @ 80Hz) that drives Simaudio W4150 solid state amp that drives DIY subs

POSSIBLE CAUSES
-ROON Issue: Tested Tidal outside ROON (on a laptop) - no improvement
-Faulty Speakers (tweeters). Tested two other sets - no improvement
-Faulty DAC/Preamp - tested with a different DAC (Moon 100D that can only accept 24bits/96Khz) - no improvement
-Faulty amp - tested with a solid state amp - no improvement
-Faulty USB converter - not really tested but streaming directly from a Lumin M1 shown the same problem - no improvement
-Faulty NUC - tested streaming from a laptop - no improvement
-Noisy outlet (AC supply) - tested a few power cords ($100 to $200 each) + connected to different outlets + added power conditioner ($400ish) - SURPRISE! 50% improvement mainly due to using a different outlet in the same room ($2 type of outlet).

  • I also tested streaming directly and from my NUC to a Lumin M1 at my cottage (different power grid, different network, different speakers) - no improvement perceived
  • I tested streaming from my hard drive (tested different quality) connected to the NUC - the result is no issue, no distortion - only distortion in Tidal.
  • I tested streaming from Spotify (highest quality but still a low streaming rate compared to Tidal) - the result is no issue, no distortion
  • LAST TEST: in ROON I decreased Tidal quality from HIFI to the next lower level (forgot the name) - distortion seems to be gone completely or almost (but I am loosing overall sound quality).

HELP
I suspect a mismatch between equipment but I am surprise to hear the same issue with different equipment (Lumin M1) in a different location (my cottage). I also suspect that the internet quality and supporting hardware may be the cause (low speed at the cottage and poor CAT5 in-wall cables and poor switch at home).

Do you have any suggestion for the cause or a test to propose?


explorateur
Thanks Prpixels. But i believe it is two different ROCK. The rock i am talking about means Roon Optimized Core Kit, which is different fron the Rock64 from Linux.

By the way, i previous said my nuc was a gen 7 - my bad, it is a gen 8 (7I7DNKE).  I believe, from what i have read, that there is only usb3 on it.

Many revelations tonight… i asked my spouse and my youngest daughter (both very musically inclined) to validate if they hear the same issue as I do. Three test tracks we focusec on : opening voice on Biko (Melt, Peter Gabriel), opening guitar on Dear Rosemary (Wasting Lights, Foo Fighters), violon ensemble at the beginning of Summertime (Ella and Louis). They heard the same (ouf, i am not crazy). We tried different configuration, no improvement. Then my wife made me realized that a few weeks ago I elevated my speakers by about 6 inches and as a result high frequencies were lounder… hum, overemphasis of the sound that bugs me. Ok, speakers back on previous stands - good improvement.

Then corrected a roon codec issue and unplud laptop (back to battery operated). Listen again to all those tracks - better but far from great. Then my daughter asked if she can lesson to those tracks on her cell phone with headsets (direct from spotify, no roon, no tidal). And she said “i am hearing the same issue!”!!! My conclusion: my system is overemphazing a sound that was there.

With the codec correctly installed, speakers back to their original position, with special attention to equipment location (NUC in the mechanical room, endpoint battery operated, etc), tracks that are well recorded are perfect, but cheap stuff (mass market rock - hello Mr Bon Jovi!) sounds awefull, whatever the source or format.

Where do I stand? Acceptation, i guess…


Out of curiosity, I just played from Tidal:
- Biko (Peter Gabriel)
- Dear Rosemary (Foo Fighters)
- Summertime (Ella & Louis)

On my system, everything sounds fine - even the specific passages that you mention. This is a result of years of cleaning up the power. It was a long and winding road. I completely empathize. When you install the LPS’s, the SQ will start improving.

I recommend reading this discussion.  
Steakster,

"In my experience, the symptoms are easiest to detect in:
HF:
- High notes that sound shrill, etched, glary, etc. This is often heard with vocalists who belt out high notes.
- Notes in the upper register of the piano that sound unnaturally ringy.
- Vocalists with unnatural sibilance.".

Wow, i do experience those on some tracks. Thanks for the link, i wil read with great interest.

including after-market umbilical cords for the LPS’s.

@steakster Who made the after-market umbilical cords for you? What type of plugs are you using?