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Old 23rd April 2016, 03:11 PM   #81
kvardas is offline kvardas  United States
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Default Amanero Hermes

Hopefully last question:

It looks like from various posts is that to connect the Amanero Hermes USB module you need to just:

Add the header pins
Stack the three boards
Connect the 5.25v power supply
Connect the outputs to the buffalo iii dac
Connect the USB input

Correct?

Thank you

Kris
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Old 24th April 2016, 05:47 AM   #82
daansan is offline daansan
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Hi,

I replaced my Hermes-BBB (and bbb) with a Hermes-Amanero (With Amanero) yesterday.

It works good with the exception that files greater than 192KHz seem to distort. The weird thing is that they played fine on the bbb with the same cronus setup.

Things that haven't changed:
- cronus with 1:2 clock divider and 45/49 family of clocks
- dac
- osf bypassed for files > 192 khz

What has changed:
- location of the cronus in the chassis
- hermes-amanero instead of hermes-bbb
- amanero instead of bbb

I do not get it, why would it sound without distortion on the bbb and with distortion on the amanero. The amanero is fed by the same bbb using squeezelite. I can see the dac report all correct sample rates, it is just that 352/384 sounds lightly distorted.

Could this have something to do with the location of the cronus in the chassis and possible interference on the i2s wires to my dac?

Thanks!
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Old 6th June 2016, 07:35 AM   #83
adeveza is offline adeveza  United States
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Sorry, newbie here. I am trying to assemble my Amanero-Hermes-Cronus, when I got to the Cronus, I was totally blank. Where can I find information on how to put together the Cronus unit? I dont want to guess as I do not want to ruin the board. Can not find any guide as to how to put this together. Please help! Russ...Anyone....

Alex
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Old 8th June 2016, 12:24 AM   #84
Russ White is offline Russ White  United States
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Quote:
Originally Posted by daansan View Post
Hi,

I replaced my Hermes-BBB (and bbb) with a Hermes-Amanero (With Amanero) yesterday.

It works good with the exception that files greater than 192KHz seem to distort. The weird thing is that they played fine on the bbb with the same cronus setup.

Things that haven't changed:
- cronus with 1:2 clock divider and 45/49 family of clocks
- dac
- osf bypassed for files > 192 khz

What has changed:
- location of the cronus in the chassis
- hermes-amanero instead of hermes-bbb
- amanero instead of bbb

I do not get it, why would it sound without distortion on the bbb and with distortion on the amanero. The amanero is fed by the same bbb using squeezelite. I can see the dac report all correct sample rates, it is just that 352/384 sounds lightly distorted.

Could this have something to do with the location of the cronus in the chassis and possible interference on the i2s wires to my dac?

Thanks!
Don't OSF bypass - ever unless you have another digital filter.
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Old 13th January 2018, 09:00 AM   #85
nautibuoy is offline nautibuoy  United Kingdom
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Regarding the configuration settings needed to an Amanero board, specified in this post;

Introducing the Hermes-Amanero

am I right in thinking that, with repurposing of pin11 on the Amanero, no mute signal is available with an Amanero/Hermes/Cronus combo?
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Old 15th January 2018, 09:38 PM   #86
Russ White is offline Russ White  United States
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Quote:
Originally Posted by nautibuoy View Post
Regarding the configuration settings needed to an Amanero board, specified in this post;

Introducing the Hermes-Amanero

am I right in thinking that, with repurposing of pin11 on the Amanero, no mute signal is available with an Amanero/Hermes/Cronus combo?
Possibly? Have a look at the firmware configuration options for the amanero - for sure it would not be isolated.
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Old 15th January 2018, 10:07 PM   #87
sbelyo is offline sbelyo  United States
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Quote:
Originally Posted by BrianDonegan View Post
You only need a 5v supply for the isolated (Cronus/DAC) side. The Ananero and Hermes are powered by the USB interface. The Cronus had its own 3.3v regulator (powered by the 5.25v supply). Typically you just share the DAC's supply.
How much current do I need to allow for the Cronus?
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Old 15th January 2018, 10:30 PM   #88
Russ White is offline Russ White  United States
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< 100ma - but it is somewhat dependent on operating conditions/loads. Still - you should really not exceed that with normal clocks etc.
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Old 16th January 2018, 12:01 AM   #89
sbelyo is offline sbelyo  United States
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Thanks Russ...

Am I right in thinking that I don't need to worry about the quality of power to the Amanero/Hermes because it will be isolated?
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Old 16th January 2018, 04:54 AM   #90
nautibuoy is offline nautibuoy  United Kingdom
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Quote:
Originally Posted by Russ White View Post
Possibly? Have a look at the firmware configuration options for the amanero - for sure it would not be isolated.
Thanks Russ.

I have been looking at the available settings;

Click the image to open in full size.

and eyeing up using Pin 1 for clock selection releasing pin 11 for muting. The initial problem is that the Pin 1 option would generate a 'high' signal when the 22/45MHz clock is required but the Cronus will expect 'high' for 24/49Mz; it shouldn't be too difficult to reverse the logic at pin 1 to go 'low' but will the Cronus clock switching work on that basis (I'm assuming Cronus requires 3.3V on its clock selector pin to lock the higher rate clock 'on')? Something ought to be achievable electronically but perhaps a more elegant alternative would be to ask Dom at Amanero if he could modify the Amanero firmware to make Pin 1 go high for the higher rate clock?

Does that all make sense?

Assuming the above hangs together, the standard Amanero Hermes board would obviously need to be modified and adding some additional isolation for the mute signal should be simple enough.

Last edited by nautibuoy; 16th January 2018 at 04:59 AM.
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