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Signalyst DSC1
Signalyst DSC1
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Old 31st August 2020, 06:13 PM   #1911
Brzzl is offline Brzzl  Europe
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Join Date: Sep 2018
Location: Austria
Signalyst DSC1
Originally Posted by vitopro View Post
Hi Pavel,

i have built the DSC 2 dac 1 year ago. My question is: Is the last prototype significally better then mine?
It woth to build last version?
I'm happy if anyone can summarize the differences between old version and new one.

Maybe nguyentanvu90 would also like to share his thoughts since he is one of the few who built the last prototype.
I'll do a thorough comparison between the two once I got the PCB for the new prototype in my hands, assambled the dac and let it play for some time. However, I'll also be using Ivan's (bisesik) 1:7 output transformers for the new version, so this might make the comparison quite unfair
But my guess from lookimg at the schematic and parts used and since Pavel is really good at what he does, is that the new version will surely be better...how much -we'll see, but definitely better
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Old 2nd September 2020, 01:40 AM   #1912
nguyentanvu90 is offline nguyentanvu90
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Join Date: Apr 2016
Can i use BBB wifi for DSD? My friend tell me it can not use. (
Click the image to open in full size.
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Old 4th September 2020, 10:42 AM   #1913
chientechnical is offline chientechnical  Viet Nam
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Join Date: May 2016
Location: 122050, Hanoi
It hard for newbie (plug and play) if use GentooPlayer, Pypy images...becase very hard to find the IP address wifi of BBW on the LAN network
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Old 18th September 2020, 07:17 PM   #1914
mterbekke is offline mterbekke  Netherlands
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Join Date: Mar 2009
Location: Groningen
Originally Posted by Signalyst View Post
Just came to my mind that maybe some implementations that suffer from noise are using 3.3V 595's? I chose NXP AHCT595 running from 5V supply for very specific reasons.

...I've done quite a bit of measurements on my unit... Specifically at DSD512 and DSD256 rates. But I'm sticking quit a lot to DSD256 because it gives noise floor < -160 dB up to ~100 kHz. And the switching rate doesn't get too high for settling times, and allows using EC modulators with current processors.

Problem with my original low-pass filter is that if you look at the datasheets, channel separation between the channels of dual op-amp decreases as function of frequency (capacitive coupling). This of course creates a problem when used in a low-pass reconstruction filter. So I'm pretty much back to using AD797's for that.

It is quite strange beast indeed. And now I could create AMSDM7EC as well, maybe I'll look into that. Although other EC modulators cannot run at 512 rates, that one has more parallelization opportunities.

It could work well with both DSC DACs as well as some other discrete implementations and the very latest AKM chips.
See post 1831. Ppy also had troubles, also couldn't pinpoint it.
It could be badly handled cmos (esd etc), faulty/dirty pads etc etc.

I double checked and you had me worried there for a moment but I used nxp hct's, original stuff, shouldn't have been the problem.

Either way, I saw you updated the amsdm7, which is sometimes a real charm to have as an option. I still have to upgrade to HQP4 though, as well as some hardware upgrades.

Many thanks for the options, it's a real toolbox sometimes, and the first choice for casual playback as well!

Have a good weekend,

Fewer words pls!
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Old 21st September 2020, 06:00 PM   #1915
Brzzl is offline Brzzl  Europe
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Join Date: Sep 2018
Location: Austria
Signalyst DSC1
Has anyone building the new dsc2 prototype 2pcs of the LTC6228IS6#TRMPBF left over? Just asking because the parts are not in stock on every site I looked and I would have to wait a whole month for them to be in stock....
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Old 19th October 2020, 01:12 PM   #1916
GoldenOne is offline GoldenOne
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Join Date: Oct 2020
Is there anyone currently selling assembled versions of the 2.6.2?
This is something i'd very much like to try but it seems that getting the boards and components is going to be somewhat prohibitively difficult and expensive at the moment.
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Old 19th October 2020, 02:22 PM   #1917
uncola is offline uncola  United States
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Join Date: May 2012
I'm also interested in an assembled board. And I'll pay $1 more than golden one
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Old 19th October 2020, 02:49 PM   #1918
ppy is offline ppy  Russian Federation
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Join Date: Aug 2015
Location: Russia
Originally Posted by GoldenOne View Post
Is there anyone currently selling assembled versions of the 2.6.2?
My friend of mine can help you - Alexey zhidkov.av@gmail.com
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