Signalyst DSC1

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#2,021
sanji99 said:
Hi Paul, have you tried play BBB (with Pure-Botic) & PPY-recklocker & digital output board also with TOSLINK, SPDIF, AES / EBU or just with I2S output ?
I tried to connect a CD player that has SPDIF and TOSLINK inputs from 44.1 to 192 kHz (16 to 24 bits) with such combination but DAC in CD player
does not recognize any signal.
PPY-recklocker is original (not modified), I try with UPNP and NAA (hqplayer) protocols, Pure version is from 06.12.2020.
Also, I believe that Pure must be set in I2S mode and not in USB or SPDF ?

NB When I use I2S DSC2 DAC, everything works perfectly but only when streaming is DSD signal, of course.
Click to expand...
Output board need extra DC5v power supply.
 
#2,023
nautibuoy said:
The oscillators are available from Audiophonics

https://www.audiophonics.fr/en/comp...584-ultra-low-jitter-clock-45mhz-p-14033.html

and the ICs are available from the normal places like Digikey, Mouser or, if you're in the EU, Time but seem to be victims of the global shortage of silicon - maybe check ebay for a local small supplier but expect to pay an inflated price and be less confident about provenance.
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Dear Nautibuoy and Jesper,
thank you very much!

Thanks for your advice, I realize that, unfortunately, we are in the middle of a big mess and, unfortunately, it seems that nobody has what I am looking for.

I have tried to find alternatives with the tools provided by Mouser, but without success. Does anyone know alternatives to the ICs that I need to close this project?
 
#2,024
Paul9334 said:
Output board need extra DC5v power supply.
Click to expand...
Hi Paul, I know that I2S_1 / I2S_2 jumper must be in position I2S_1. But do the 2 jumpers (red circle in the attached image) have to be shorted or free for our configuration ?
 

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#2,025
sanji99 said:
Hi Paul, I know that I2S_1 / I2S_2 jumper must be in position I2S_1. But do the 2 jumpers (red circle in the attached image) have to be shorted or free for our configuration ?
Click to expand...
Hi all, just to let you know that everything works great, there seems to be some problem at 44.1 and 48 kHz, I'll analyze that along the way. In the next phase I will connect this same CD player directly via I2S to run at 384 kHz (now plays great with 24/192).
 

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#2,028
Paul9334 said:
I completed PPY's BBB player, I mod circuit diagram & PCB layout ,added master clock selector / power supply board and spdif / optical & IIS over HDMI socket output board ,two clock selected by buffer IC and enable when need, clock using DIP14 socket , all reg. IC upgraded to LT3045. Using PPY's pure firmware. Thanks for PPY.
View attachment 1044763View attachment 1044764View attachment 1044766View attachment 1044763
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Hi Paul, I would like to ask you for an explanation, why did you use ACCUSILICON AS318-B-451584 for the Crystal Clock Oscillator instead of NZ2520SDA which is in the original scheme for ppy reclocker?
 
#2,029
After a very long time, I'm finally getting back to this project, to build a DSC2

Just placed a Mouser order for most of the stuff, and also some connectors from proto advantage. Had to substitute a few ICs because couldn't find the potato semi stuff, but I think I found suitable replacements.

Be a good test for my newish hot air gun, will see if I can use it properly to put this together.

Randy
 
#2,032
@ppy
I do have a question since you're here

On the DSC2 design,
J5-J8, pins 1&2, 3&4, etc are all shorted, which would short out the ladder resistors.

So I figured I have to cut all the traces between those pins. Then it looks like things will be connected correctly after I install the resistor boards.

Is that right? I don't see how it would work otherwise, but maybe I'm missing something.

Randy
 
#2,036
@Paul9334

Dear Paul,
finally back to your project, I need some information that I can't find on my own but I need to finish the job.

The first thing are L1 and L2, in the list of components there are the same ones that Pavel uses in his project, but the space on your pcb is very small: which components did you use?

The second thing concerns the wiring of the switch (on off) and of the led, would you share the connection diagram with the bbb and the output card, so that I can reproduce it, because I can't find references on my own?

Also a curiosity: how is the on and off logic? How did you get the power supply disconnected from the mains?

Thanks for everything
Sergio
 
#2,037
I assembled the DAC in the Beagle Bone version. For now, I only use with Amanero. I have a few questions. I temporarily installed E25 transformers, the target R3 is just coming to me. Can these transformers be optimally matched to the system? I know that despite the 10k:10k designation, these are completely different transformers. Next question. Are there 595 registers from modern production that can fully replace the old Philips or NXP ones. I can't find the old ones anywhere
 
#2,040
Hi @ppy

Jussi (HQP) has mentioned:

"make and model of the switch register-latches is pretty critical. Even if the model number is the same, different manufacturers have different implementations. Although they all work the same from digital data function point of view. However, this DAC use is a mixed-domain use case and very different from what the chip was originally designed for."
Click to expand...

Can you share details about what has been implemented in your DSC2 design?

An improvement over DSC1 ?

Thanks!
 
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