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Holo Cyan 2


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Would using Holo Red as a DDC output IIS to Cyan 2 add anything to the performance of Cyan 2 with HQ Player? I use a DDC in my current setup (see signature) for additional (galvanic) isolation and on the view that IIS input may be inherently superior to USB, but unsure if those potential advantages holds true with Cyan 2 and warrant the additional expense / complexity. Thoughts?

Desktop: HQ Player --> Singxer SU-1 --> Matrix X-Sabre Pro --> McChanson SuperSilver UltimatE

Headphones: Audeze MM-500, Meze Audio Elite, Focal Utopia 2022, Focal Bathys (Wireless)

Portable Gear: Hiby RS6, xDuoo XD05 Bal 2, FiiO BTR7, Creative BT-W5, FiiTii HiFiDots TWS

Nearfield Active Speakers: Audioengine HD3 

Power Conditioning: Furman Elite-15 PFi

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Another clarifying question, hopefully not revealing too much of my newbie-ness: In the analogue output description below, is it the case that if you feed the Cyan 2 PCM it outputs at 48k regardless of incoming rate, and if you feed it DSD from HQPlayer that it outputs all at DSD128 such that true NOS is not possible with DSD? I suspect I may not be interpreting the below correctly. 😟

Cyan2AnalogueOutput.thumb.jpg.187b8c0fc8d1bd5d7817f14754251581.jpg

Desktop: HQ Player --> Singxer SU-1 --> Matrix X-Sabre Pro --> McChanson SuperSilver UltimatE

Headphones: Audeze MM-500, Meze Audio Elite, Focal Utopia 2022, Focal Bathys (Wireless)

Portable Gear: Hiby RS6, xDuoo XD05 Bal 2, FiiO BTR7, Creative BT-W5, FiiTii HiFiDots TWS

Nearfield Active Speakers: Audioengine HD3 

Power Conditioning: Furman Elite-15 PFi

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14 minutes ago, LoryWiv said:

Another clarifying question, hopefully not revealing too much of my newbie-ness: In the analogue output description below, is it the case that if you feed the Cyan 2 PCM it outputs at 48k regardless of incoming rate, and if you feed it DSD from HQPlayer that it outputs all at DSD128 such that true NOS is not possible with DSD? I suspect I may not be interpreting the below correctly. 😟

PCM 48k and DSD128 are digital inputs. The analog output measurement values on the right side are related to the digital inputs on the left side: the upper half to PCM 48k and the bottom half to DSD128.

i7 11850H + RTX A2000 Win11 HQPlayer ► Topping HS02 ► 2x iFi iSilencer ► SMSL D300 ► DIY headamp DHA1 ► HiFiMan HE-500
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5 minutes ago, bogi said:

PCM 48k and DSD128 are digital inputs. The analog output measurement values on the right side are related to the digital inputs on the left side: the upper half to PCM 48k and the bottom half to DSD128.

Git it, thanks @bogi. 

Desktop: HQ Player --> Singxer SU-1 --> Matrix X-Sabre Pro --> McChanson SuperSilver UltimatE

Headphones: Audeze MM-500, Meze Audio Elite, Focal Utopia 2022, Focal Bathys (Wireless)

Portable Gear: Hiby RS6, xDuoo XD05 Bal 2, FiiO BTR7, Creative BT-W5, FiiTii HiFiDots TWS

Nearfield Active Speakers: Audioengine HD3 

Power Conditioning: Furman Elite-15 PFi

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  • 2 weeks later...
37 minutes ago, skipspence said:

But does Cyan2 use any physical clocks? 

It looks like it doesn't have any clocks internally beside FPGA? 

 

Yes it does. Those could be under the converter board on the main PCB. But I have not seen any pictures on what components are below the converter board...

 

Signalyst - Developer of HQPlayer

Pulse & Fidelity - Software Defined Amplifiers

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19 minutes ago, skipspence said:

They are usually on USB receiver board, where I didn't spot them, so maybe... 

But clocks aren't even mentioned anywhere, that's what made me some suspicious) 

 

In best case, USB board has only the 12 or 24 MHz USB clock. Audio clocks should be elsewhere. Closer to the conversion section, the better.

 

Also the conversion board could have components on both sides, we don't know what is underside either. Plus there's a plenty of space under the converter board on the main board that is hidden, unless the conversion board is removed.

 

Do you have some reason to be suspicious?

 

Spring 3 pictures also have equally well hidden clocks. Especially on the one that has preamp board installed on top of the conversion board:

20200125-holo-%E6%99%B40751-1-2048x1344.

 

Signalyst - Developer of HQPlayer

Pulse & Fidelity - Software Defined Amplifiers

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In Spring 3 description and manual (for I2S imput) :

 

Using the ultimate performance of PLL+FIFO technology, provides 0.1Hz Third-Order low-pass ability to inhibit jitter. It also uses a high-performance femtosecond VCXO as the PLL clock source. Under the premise of being almost immune to the front-end jitter, it can also lock up to 1.5us-2us @ 1KHz signal with high jitter. (It can lock up to 1.5us-2us @ 1kHz signal with high jitter on the premise of almost being immune front-end jitter).

 

And for Spring I2S :

A single, independent HDMI-I2S input interface is provided, which has a four-way independent circuit, as opposed to standard LVDS chip, making I2S clock signals subject to lower interference and lower jitter. In addition, the I2S input can be configured with a specific pinout configuration, making it compatible with most of the HDMI-I2S digital devices on the market.

 

But i think, for CYAN 2, is a standard LVDS chip (?) 🤨

... note: i2s is not hot swappable, so never plug or unplug i2s cables when the devices are powered on. Always turn off both devices before

ROON + HQP / Hdplex H3-i5 + 400ATX >Gustard A26 (NAA twk) > SQM > Benchmark AHB2 / Recital Audio Illumine HEFA

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1 hour ago, Miska said:

Do you have some reason to be suspicious?

 

1 hour ago, skipspence said:

But clocks aren't even mentioned anywhere, that's what made me some suspicious) 

... only this)) 

 

In fact the manual for Cyan2 has very sparse description other than that: "The Altera MAX II CPLD chip in CYAN 2 is used to process the clock signal and optimize the quality of the digital audio signal by significantly reducing jitter"...  and Altera as seen is exactly on USB receiver, which seems just like very standard... 

Screenshot_2024-02-14-17-45-46-902-edit_com.opera.browser.jpg

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46 minutes ago, Miska said:

 

That is one of the three I spot here. One on the USB interface, one next to the other inputs (probably PLL for the S/PDIF and I2S) and one on the converter board:

CYAN2-DAC-20231101-6-scaled.jpg

 

But overall, Cyan 2 jitter performance using USB input is usual Holo Audio quality, absolutely excellent!

 

Holo_Cyan2_Jtest24_DSD256.thumb.png.160b29a8097508084276139a1c8bcdde.png

Thanks Miska. I really should consider selling my spare intona 7055c and my Supra Excalibur USB cables then. Wow I am actually making a profit by owning a Cyan 2!!! 

 

Cheers

 

Deric 

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PLL is used with SPDIF and I2S. It has nothing to do with asynchronous USB.
Furthermore, only USB input is galvanically isolated, not I2S input.

 

I2S was originally designed for short in board connection uses. I2S signal containing external clock is prone to be affected by EMI over long I2S leads. EMI imposed to clock signal is source of jitter. That's the reason why from jitter point of view asynchronous USB is technically superior to I2S input, even if Holo makes maximum to eliminate I2S jitter as much as possible.

i7 11850H + RTX A2000 Win11 HQPlayer ► Topping HS02 ► 2x iFi iSilencer ► SMSL D300 ► DIY headamp DHA1 ► HiFiMan HE-500
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Yes, and a measurement would be interesting to see how this input performs, even if theoretically it would be overtaken by the usb, Holo version. 😉
And I've seen some I2S measurements from a Spring... identical in quality to the USB.
@Miska If the Cyan is still plugged in... no possibility to test the I2S input?

ROON + HQP / Hdplex H3-i5 + 400ATX >Gustard A26 (NAA twk) > SQM > Benchmark AHB2 / Recital Audio Illumine HEFA

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