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Audio Note Cobra DAC link issue

DAC Link issue

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#1 AntoinedSM

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Posted 25 September 2024 - 08:27 PM

Hi,

Yesterday, I configured Jplay Femto on my computer dedicated to stream my music with Qobuz and connected to my recent Audio Note Cobra via USB 2.0 câble.

I tried all possible settings but I always hear numerical noise (Distorsion or click whatever you call it).

I tried also with Roon and it works perfectly.
I really want to use JPlay, any recommandation ? Any incompatibility known with my DAC ? It is a simple 16bits/48kHz DAC, plug&play (no driver).

Many thanks for your support
Antoine
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#2 Marcin_gps

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Posted 27 September 2024 - 10:51 AM

Hi Antoine, 

 

DId you install USB Audio driver for your DAC from the manufacturer? If not, please do it. 

 

And please tell us the exact configuration in JPLAY settings panel? (screenshot is OK)

 
Best regards,
Marcin
 

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#3 AntoinedSM

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Posted 20 October 2024 - 04:19 PM

Hi Marcin,

 

Sorry for late answer, it took me time to re-setup my full configuration.

To answer your question, there is no driver for my integrated DAC, this was confirmed by Audio Note UK.

I just know that the USB input can accept up to 16-bit/48kHz.

 

I ended-up using WASAPI, classic engine and 200hz DAC link and it works properly.

I decided to get my full version

 

When trying to use KS player, it starts to make numerical noise, unacceptable whatever the engine or DAC link value.

Any idea why KS is not working ? This is due to “old school” design chosen by Audio Note ?

 

Otherwise when I want to change Engine to Xtream or ULTRAstream, I click “ok” but when I come back it returns to “classic” engine. Any idea ?

 

I can't put an image of a screenshot, site doesn’t allow. Please let me know if you need further details.

 

Thanks for your appreciated support


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#4 BernieK

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Posted 20 October 2024 - 10:04 PM

The Philips TDA1543 D/A converter chip used in the Audio Note Cobra was first found in late 80s to early 90s budget CD players. Although three decades old, these chips are regarded as remarkably enjoyable and pleasant to listen to by those using them. Still their age and the lack of a (relatively) modern driver may mean that they might not support Kernel streaming.

 

PS. Although the Cobra can accept digital signals up to 24-bit 176.4 kHz via it's coaxial inputs, the signal is truncated down to 16 bits.


Control Point: Apple iPad (9th gen), 64Gb storage, 3Gb RAM, JPLAY for iOS 1.1.1; Samsung Galaxy Tab S6 Lite, 128Gb storage, 4Gb RAM, Bubble UPnP 4.4.5; Dell Inspiron 15 5510 laptop (Windows 11 Professional (x64) Version 23H2 (build 22631.4169), Intel Core i7-11390H, 2.93 GHz, 512Gb KIOXIA M2 PCIe NVMe (RAID) SSD, 16Gb DDR4 3200 MHz RAM), Upplay 1.7.7.

Control and Audio-PCs: Asus Mini PC PN60, Intel Core i5 8250U 1.6 GHz, 250Gb Kingston A2000 M2 NVMe SSD and 8Gb DDR4 2400 MHz RAM.

OS: Windows Server 2019 (Standard Edition) in highly optimized Desktop mode, command prompt shell for initial setup after which Control and Audio-PCs run headless (monitor, keyboard, mouse all disconnected).
Optimization: Audiophile Optimizer 3.0, TrustedClean 3.1b-server on RAM Disk (automated RAM Disk creation procedure and TC settings as in my RAM Disk Guiderevised 22 July 2024), Process Lasso Server Edition 15.0.2.18, additional Windows processes/services stopped via registry editor, task manager and modified CAD DSK script (for complete procedure see my WS2019 Optimization Guiderevised 9 July 2024).

Renderer: JPLAY FEMTO 7.0D UPnP (Alternative version), Server: JPLAY FEMTO 7.0D femtoServer, File Manager: Q-Dir 11.86, Library Manager: JRiver MC 32.0.6.
JPLAY Settings: Playing via: KS, Engine: ULTRAstream, Bitstream: Native, Bitperfect Volume: OFF, DAC Link: 1000, XtreamSize: 1000, Throttle: ON, Hibernate Mode: ON.

Equipment ConfigurationTablet/Laptop > WiFi > Control-PC > 1m SUPRA Cat 8 Ethernet Cable > Audio-PC > 3m Chord C-USB Cable > Topping D90SE > 1m Chord Chameleon Plus XLR cables with Neutrik connectors > Rotel RC 1590 > 2m Mogami NEGLEX XLR cables with Neutrik connectors > March Audio P501 Monoblocks with Purifi 1ET7040SA modules > Van Den Hul CS-122 Hybrid speaker cables (Neotech banana/spade connectors) > Bryston PX-1 external crossovers > speaker cables (as before) > Bryston Model T Signature Speakers. AC power filtered/cleaned via Thor A12BF Smart Power Board. 

Music Storage: Main Library: 6Tb Seagate HDD/Hub+6Tb Seagate HDD (all connections via 0.5m Avencore Premium USB 3.0 cables); Backups (x2): as per Main Library.


#5 Marcin_gps

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Posted 21 October 2024 - 09:03 AM

Hi Marcin,

 

Sorry for late answer, it took me time to re-setup my full configuration.

To answer your question, there is no driver for my integrated DAC, this was confirmed by Audio Note UK.

I just know that the USB input can accept up to 16-bit/48kHz.

 

I ended-up using WASAPI, classic engine and 200hz DAC link and it works properly.

I decided to get my full version

 

When trying to use KS player, it starts to make numerical noise, unacceptable whatever the engine or DAC link value.

Any idea why KS is not working ? This is due to “old school” design chosen by Audio Note ?

 

Otherwise when I want to change Engine to Xtream or ULTRAstream, I click “ok” but when I come back it returns to “classic” engine. Any idea ?

 

I can't put an image of a screenshot, site doesn’t allow. Please let me know if you need further details.

 

Thanks for your appreciated support

If you have a USB Audio Class 1 DAC, please set UAC1USB entry in regedit to 1 under Computer\\HKEY_LOCAL_MACHINE\Software\JPLAY7 key
Restart JPLAY Audio service or reboot afterwards and switch Engine to Classic in JPLAY Settings panel
 
KS should work then
 
Best regards,
Marcin

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