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Old 25th March 2015, 11:33 PM   #11
Russ White is offline Russ White  United States
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Just need some time for assembly - no small task.
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Old 26th March 2015, 12:06 AM   #12
dwjames is offline dwjames  United Kingdom
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Just ordered a Cronus with 50mhz clocks and a bbb hermes. thanks
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Old 26th March 2015, 02:05 AM   #13
bloodfromastone is offline bloodfromastone
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1. Can the chosen clock be effectively used to synchronize a secondary device, as well as provide base clocks to the primary device (in this case, remove clock drift between the BBB clock and an input device, whose clock could be surgically replaced)?

2. Are there any general downsides, other than maximum sample rate, to slower clocks, like the 22-24MHz, and 11-12MHz?
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Old 26th March 2015, 02:10 AM   #14
Russ White is offline Russ White  United States
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Quote:
Originally Posted by bloodfromastone View Post
1. Can the chosen clock be effectively used to synchronize a secondary device, as well as provide base clocks to the primary device (in this case, remove clock drift between the BBB clock and an input device, whose clock could be surgically replaced)?

2. Are there any general downsides, other than maximum sample rate, to slower clocks, like the 22-24MHz, and 11-12MHz?
1. The idea is you have exactly one authoritative clock base. Yes. The source uses it to derive it's stream - and Cronus makes certain that in the end the signals are all finally aligned and sent to the DAC. You would not want to have two clock domains except in the case where you are doing ASRC as you can do with the ES9018 etc.

2. None. They will work great! That is precisely why we make clock options so easy.

Cheers!
Russ
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Old 26th March 2015, 02:24 AM   #15
syklab is offline syklab  United States
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Hi Russ,
I got little lost on which module I will need to use on my BBB + Dac (with I2S input).
Do I need all of the followings:
Hermes-BBB Isolator Module
Cronus re-clocking + Rhea

If I also want to use USB input via Amenero together with BBB, Will I need another Hermes-AmeneroUSB Isolator Module ? Will I have 2 Hermes connected to the Cronus ?
Any example connection diagram available?

Also How do I choose between these 2 options :

Cronus Re-clocking Module with 45.1584/49.152MHz Rhea Pair
Cronus Re-clocking Module with 22.5792/24.576MHz Rhea Pair

Thanks
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Old 26th March 2015, 02:36 AM   #16
Russ White is offline Russ White  United States
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@syklab

You will most likely want the combo - Cronus Re-clocking Module with 45.1584/49.152MHz Rhea Pair + the Hermes-BBB It just depends on the max sample rate you think you will use. For up to 192Khz you can do the 22.5792/24.576MHz. You need the 45.1584/49.152MHz clocks for up to 384khz.

You can also get the Hermes-Amanero but you can't use both hermes at the same time - but you can easily switch back and forth.

More information will be presented in the Hermes threads.

If there is demand we could easily produce a 2:1 multiplexer for connecting two Hermes modules to a single Cronus. Or you could actually use 2 Otto-II right now.
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Old 26th March 2015, 07:31 AM   #17
bern is offline bern  Poland
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Hi,
Thanks for this project.
Now I can see that you offer blank (with no parts) boards: Rhea and Hermes-BBB Isolator Board.
But what about blank (no parts) Cronus board? Are you going to offer it in the future?
Regards,
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Old 26th March 2015, 08:26 AM   #18
kinku is offline kinku  United States
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Cronus - It's about time.
Will Cronus Re-clocking Module with 45.1584/49.152MHz Rhea Pair can handle 44.1.khz samples without resampling?
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Old 26th March 2015, 08:46 AM   #19
GourouLubrik is offline GourouLubrik  France
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Quote:
Originally Posted by Russ White View Post
If there is demand we could easily produce a 2:1 multiplexer for connecting two Hermes modules to a single Cronus. Or you could actually use 2 Otto-II right now.
I guess there will be demand for such a module!
And even for a 4:1 multiplexer
I can easily imagine a dac with:
- An embedded network player such as BBB
- An amanero for external usb connectivity
- A spdif => i2s module
- An external LVDS i2s connector (hdmi or RJ45) input such as TPA teleporter.

If one want to build a flexible synchonous ES9018 dac, such a module nearly mandatory.
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Old 26th March 2015, 11:34 AM   #20
twluke is offline twluke  Japan
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Cronus - It's about time.
Quote:
Originally Posted by Russ White View Post
Hi Folks,

You can find it here:
Cronus Reclocking
-snip-

Ask away!
Thank you for this info and congratulation on your great works. I'm very happy to have this occasion of ordering these items at last.

BTW, how do you pronounce Hermes? Simply in an English way or somewhat in a French way like a luxurious brand, or even in a way back to the ancient Greek?

I know the question is silly but couldn't resist to ask .

twluke
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