Do you have a good picture of the finished and populated Cronus board anywhere?
I'd like to understand power and output connectors.
Also, is the Cronus output isolated or is the isolation just in the hermes?
thanks,
James
I will try to get pictures done tonight, but more likely tomorrow. Also working up some diagrams.
Hi, is possible to use with Buffalo 2 at 384khz?
At this moment I have Amanero+Buffalo 2 how should I integrate?
Thank
Yes, though connecting the external clock is a bit more tricky with the B-II.
1) You need to remove power to the on-board XO, which is done by removing the L3 ferrite on the bottom of the board.
2) You can connect the external XO to the label side of the R17 pads and to GND.
Other than that, you use Amenero with the Hermes-Amenero, connect them to Cronus, then to the B-II input header. There is a separate output for MCK on the Cronus to make the connections noted above.
I'm sorry if I'm way off base here, haven't followed the project that closely, but could Cronus be adapted to be a word clock generator/distributor in a pro audio setting?
Very possibly - but that was not a design goal.
Very possibly - but that was not a design goal.
Cool thanks, I'll have to follow the project and give it some thought as the documentation develops. Love y'alls stuff btw, my BIII has been singing for a few years now.
Finally!congratulations
I have ordered Cronus and Hermes/rhea. Can't wait till it finally arrives!
Regarding the bbb-pi debate; the new raspberry pi 2 is a quite different board than the old one. There is also much more development (hardware and software) in the Pi camp. So maybe it is worth investigating again.
Regards,
I have ordered Cronus and Hermes/rhea. Can't wait till it finally arrives!
Regarding the bbb-pi debate; the new raspberry pi 2 is a quite different board than the old one. There is also much more development (hardware and software) in the Pi camp. So maybe it is worth investigating again.
Regards,
Thanks to all for the kind words. I can't wait until you get to experience what I am currently experiencing - which is spectacular audio coming from my BBB (and amanero - just not at this very moment)
It will very very cool to hear back from you all.
As for RPI-2 I have four of them. I like them a lot. If we can get them to accept an external audio master clock we will be all set - otherwise you really can't do it right - you might as well just use it straight into an ASARC DAC like the B3/B3SE - or use it with our Metronome (that is what I have been doing into a COD and Opus).
It will very very cool to hear back from you all.
As for RPI-2 I have four of them. I like them a lot. If we can get them to accept an external audio master clock we will be all set - otherwise you really can't do it right - you might as well just use it straight into an ASARC DAC like the B3/B3SE - or use it with our Metronome (that is what I have been doing into a COD and Opus).
Here is the Hermes-BBB thread for BBB/Botic specific questions and such.
http://www.diyaudio.com/forums/twis...-botic-cape-beaglebone-black.html#post4272641
http://www.diyaudio.com/forums/twis...-botic-cape-beaglebone-black.html#post4272641
It is never *ever* a good idea to mix time domains - you will always introduce errors and lose data. This is because the source clock and the relocking master clock can never be in synch. The problem is you simply cannot correctly reclock an RPI without using a FIFO etc. By the time you do that you will be much better off with BBB.
Correct me if I'm wrong, but if RPI doesn't accept external master clock, it seems to accept external bit clock.As for RPI-2 I have four of them. I like them a lot. If we can get them to accept an external audio master clock we will be all set - otherwise you really can't do it right
With the right clock divider and the according alsa module fixing the dividing factor, I think the same level of quality can be obtained on stereo pcm from RPi than with BBB.
(I don't deny that BBB is a nice solution, but the dev base and user base are far behind RPi's)
As a starter, see "philpoole" posts in this page which state that he managed to use the bitclock as input to slave i2s output:
Raspberry Pi • View topic - I2S sound: Anyone got it running? (answer is yes!)
Raspberry Pi • View topic - I2S sound: Anyone got it running? (answer is yes!)
Here is a picture of an assembled Cronus I took this morning before running off to work.
These are your clock input options:
Signal output can be via u.fls, 0.1" header (we will supply stacking headers), or terminal blocks.
Stacking header mates directly to 8-channel Buffalo, which will also supply power through Buffalo's VD supply.
MCK outputs are via pin headers, u.fls or SMA connector.
Output signal termination resistors will be supplied as through hole (mini resistors) and SMT parts to allow easy customization for your application, in case you need a different value.
These are your clock input options:
- SMT clocks mounted on Rhea modules
- 8- or 14-pin through-hole clocks
- External clocks via u.fl connectors
- External clocks via SMA connectors
Signal output can be via u.fls, 0.1" header (we will supply stacking headers), or terminal blocks.
Stacking header mates directly to 8-channel Buffalo, which will also supply power through Buffalo's VD supply.
MCK outputs are via pin headers, u.fls or SMA connector.
Output signal termination resistors will be supplied as through hole (mini resistors) and SMT parts to allow easy customization for your application, in case you need a different value.
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And here is the top side of Rhea - which may answer the question above.
You can use 5 x 7 clock and the larger Crystek CCHD-9xxxx clocks as well as the small NDK types. There is a spot for optional (some clocks may need it) local bypass cap on top and on the bottom.
You can use 5 x 7 clock and the larger Crystek CCHD-9xxxx clocks as well as the small NDK types. There is a spot for optional (some clocks may need it) local bypass cap on top and on the bottom.
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