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Old 17th September 2019, 09:07 AM   #821
merlin el mago is offline merlin el mago  Europe
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Wow Brian, super thank you very much.

I'm using DIYINHK I2S isolator so I guess LRCK = FSCK?

Cheers
Felipe

Last edited by merlin el mago; 17th September 2019 at 09:32 AM.
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Old 17th September 2019, 10:07 AM   #822
merlin el mago is offline merlin el mago  Europe
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What are the inputs pins at Cronus for D1 D2 and DCK at Hermes header?

Pin 1 DCK
Pin 3 D1
Pin 5 D2

I guess output pins at Cronus for D1 D2 and DCK at B3 header, only to be sure are the same like input?

Pin 1 DCK
Pin 3 D1
Pin 5 D2
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File Type: png Cronus_OUT DCK, D1 & D2.png (17.1 KB, 160 views)
File Type: png Hermes_pinout DCK, D1 & D2.png (17.1 KB, 163 views)

Last edited by merlin el mago; 17th September 2019 at 10:12 AM.
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Old 19th September 2019, 04:16 PM   #823
BrianDonegan is offline BrianDonegan  United States
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Cronus - It's about time.
Quote:
Originally Posted by merlin el mago View Post
What are the inputs pins at Cronus for D1 D2 and DCK at Hermes header?

Pin 1 DCK
Pin 3 D1
Pin 5 D2

I guess output pins at Cronus for D1 D2 and DCK at B3 header, only to be sure are the same like input?

Pin 1 DCK
Pin 3 D1
Pin 5 D2
Hermes and Cronus output pins are the same.
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Old 19th September 2019, 05:41 PM   #824
merlin el mago is offline merlin el mago  Europe
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Quote:
Originally Posted by BrianDonegan View Post
Hermes and Cronus output pins are the same.
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Old 22nd September 2019, 05:18 PM   #825
merlin el mago is offline merlin el mago  Europe
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Just finished.

I use the high frequency clock in X1 socket is ok?

Are OK the jumper headers?

I checked the solder but to double test do you see any bad or cold solder joint?

Thanks for support
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Old 22nd September 2019, 09:43 PM   #826
barrows is offline barrows
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Default X1...

Quote:
Originally Posted by merlin el mago View Post
Just finished.

I use the high frequency clock in X1 socket is ok?

Are OK the jumper headers?

I checked the solder but to double test do you see any bad or cold solder joint?

Thanks for support
X1 position should be the base 44.1 XO, not the faster one.

Jumper positions depend on the XO frequency and what XO frequency your source needs.
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Old 23rd September 2019, 11:04 AM   #827
merlin el mago is offline merlin el mago  Europe
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Quote:
Originally Posted by barrows View Post
X1 position should be the base 44.1 XO, not the faster one.

Jumper positions depend on the XO frequency and what XO frequency your source needs.
Thank you, mine source is the noDac so only DSD.
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Old 4th October 2019, 11:43 AM   #828
merlin el mago is offline merlin el mago  Europe
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Default External power

Please schematic to power the unit externally to bypass the onboard regulators.
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Old 4th October 2019, 02:08 PM   #829
barrows is offline barrows
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Default Why...

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Originally Posted by merlin el mago View Post
Please schematic to power the unit externally to bypass the onboard regulators.
Would you want to do that? The onboard regulator was specially chosen for its low output impedance and low noise. Add that to the fact that it is very close, circuit trace wise, to the position of the oscillator(s) and it is doubtful that an external supply of any type could give any advantage.

If you are using it only for DSD, here is a tip, this only works if you are using only 44.1 base frequency DSD, meaning: 2.8224, 5,6448, 11.2896, etc... Mount only the single clock in X1, and then jump the two clock positions with a short u.fl cable. This way the DAC has only a single beating oscillator to deal with, and the power supply is only modulated by a single beating oscillator. I use this approach with both of my DACs which only use DSD input.

When I asked what the source was I meant the digital source: Amanero, BBB, etc. For Amanero it requires low frequency clocks: since you are using a NoDac approach I am assuming the "DAC" does not require master clock, only bit clock and the R and L DSD data, right? If so, mount a single 22.5792 clock (I prefer NDK SDA series with .01 uF bypass on the Rhea board) to have the lowest phase noise (unless you have a Pulsar clock around) and set the clock divider at 1:1 for Amanero. I do not know what rate the BBB requires if you are using that.
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Old 4th October 2019, 02:12 PM   #830
merlin el mago is offline merlin el mago  Europe
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That's very good information. Mine digital source is Amanero. Do you have a picture how to jump the two clock positions with a short u.fl cable? One clock it's only to max. DSD256? It's only OK to convert DSD for PCM 44.1?

Could post the pic showing where is installed the .01 uF bypass on the Rhea board? Also I use NDK SDA oscillators.

I asked for external power because I will use DIYIHK USB-I2S isolator: can accept 5V as Cronus but possible works better wit 3.3V, that's the reason I asked.

noDac don't requires bit clock, only R & L.

TIA
Felipe

Last edited by merlin el mago; 4th October 2019 at 02:26 PM.
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