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Signalyst DSC1
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Old 30th August 2019, 05:55 PM   #1541
Raj1 is offline Raj1  United Kingdom
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Sorry, I didn’t know that. I thought I’d seen you mention it somewhere, but its possible I was mistaken.
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Old 30th August 2019, 09:48 PM   #1542
nautibuoy is online now nautibuoy  United Kingdom
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Quote:
Originally Posted by Raj1 View Post
Sorry, I didnít know that. I thought Iíd seen you mention it somewhere, but its possible I was mistaken.
I've had a couple of AKM DACs before I cleared down a few projects...
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Old 31st August 2019, 12:40 AM   #1543
gionag is offline gionag  Italy
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Made a simple but effective PSU for the DSC2.

CRC for the reclock (13200uf + 0.5ohm + 13200uf)
CRC for the analog output (13200uf + 0.5ohm + 13200uf)
5v Regulated for BBG (18800u + LM1084-5.0)

works like a charm.

Sound wise, to me, appear to sound as good as other more exotic solution.
so maybe. if someone needs a valid and quick psu this arrangement is worth a shot.

If someone trust me enough on that i can share pcbs or gerber.
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Old 31st August 2019, 04:40 AM   #1544
Raj1 is offline Raj1  United Kingdom
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Originally Posted by nautibuoy View Post
I've had a couple of AKM DACs before I cleared down a few projects...
Ahh, ok. I currently have an AK 4497. It’s very transparent in direct DSD mode. I was wondering how it stacks up against other solutions. I guess Ill have to check things out.
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Old 31st August 2019, 06:34 AM   #1545
nautibuoy is online now nautibuoy  United Kingdom
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Quote:
Originally Posted by gionag View Post
Made a simple but effective PSU for the DSC2.
Very neat and tidy.
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Old 31st August 2019, 11:51 AM   #1546
nautibuoy is online now nautibuoy  United Kingdom
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More work to do on my DSC2 build. Plugged it into the main system and was greeted by a loud buzz so some analysis of the grounding is required I think.

Ray
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Old 1st September 2019, 10:28 AM   #1547
chientechnical is offline chientechnical  Viet Nam
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What your DC output from direct of R FIR?
I measured on my pcb are 1.65VDC. It's correct?
Tks u.

Last edited by chientechnical; 1st September 2019 at 10:31 AM.
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Old 1st September 2019, 10:44 AM   #1548
gionag is offline gionag  Italy
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2.5vdc
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Old 16th September 2019, 08:31 PM   #1549
nautibuoy is online now nautibuoy  United Kingdom
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Paging ppy!

Hi Pavel, do you have a mechanical drawing of your isolator/reclocker board available? I particularly need to know the position of pin 1 of the output header in relation to pin 1 of the BBB P9 header.

I plan to use one of your isolator/reclocker boards on the input of the delta-sigma Valve DAC project I'm working on so I need to calculate where to drill the holes for the BBB stand-offs relative to the DAC PCB.

Many thanks

Ray

BTW, I'm really please with the results of my DSC2 V2.5.2 and have started exploring the different HQP settings. Chanks for all your work on the development.
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Old 20th September 2019, 01:36 PM   #1550
Signalyst is offline Signalyst  Finland
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Quote:
Originally Posted by Vit123 View Post
As far as I remember, the only reason why AK4137 was not used with DSC is the result of subjective uncontrolled listening tests (including mine). It was concluded, that HQP is far better in PCM-DSD conversion.

Have to say, that this is a very controversial conclusion. Must be checked in DBT. Think that I personally became a victim of expectation biasing.
What I've measured couple DACs that use AK4137, it has horribly bad performance. Both high noise floor in audio band plus the noise profile jumps up early. I was expecting much better performance from AKM.
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