IF, and i underline, IF you would trust my parts for genuine NXP (i am not sure 100%, but the datecode seems promising) i have emptied a stock from a local supplier and i have a good pile of them "in stock".
I am still waiting for some other parts, so i can not guarantee that performs as expected...
If someone is interested we can arrange in PM.
Where to buy Pcb
I want to build the Dsc 2.6 but I would like to know where you ordered the pcb.
Thanks. virginio
I want to build the Dsc 2.6 but I would like to know where you ordered the pcb.
Thanks. virginio
What about the resistor array prints? Do you have them too? Or where do you get them?
For anyone who needs that.
At the moment i have to spare :
- 3 x DSC 2.6.2 "MainBoard"
- 12 x DSC 2.6.2 "Resistor carrier" board (But read NOTE1)
- ~100 x 74ahct595d from NXP (But read NOTE2)
All this items are in Italy.
NOTE1 :
-1kit (4pcs) are in 1.2mm thickness (ready for connectors)
-2kit (8pcs) are in 1.6mm thickness (ready to solder at 90° using connectors pads)
I made that because in my final assembly i didn't used the very "pricier and hard to source" connectors to join the carriers to the mainboard. Instead i have used a solderbridge where the two boards met at 90°. So, make your decision on how you want to proceed.
NOTE2 :
At the moment, beside a very promising date code (year '97) i don't have other clues if they are still original NXP or not.
the markings don't have the "X" so i am 90% sure they are NXP... but until i don't have an "electrical" way to determine that, you have to cut the risk with me.
I don't quite understand the "solder bridge" you mention.
Could you make a picture of your solution?
Attachments
Nice!like this
(not my finest job... please, don't judge)
But why not solder the resistors directly on the motherboard then?
finally...
freshly baked from the modded oven...
beside few scary moments upon power-up...
now it sings...
and i am speechless... maybe for lack of better comparison... but this thing to me sound like nothing else...
addictive to volume to say the least.
Thanks to all the people that has contributed to make this project possible. Today guys you make a person happy. Feel good about that.
freshly baked from the modded oven...
beside few scary moments upon power-up...
now it sings...
and i am speechless... maybe for lack of better comparison... but this thing to me sound like nothing else...
addictive to volume to say the least.
Thanks to all the people that has contributed to make this project possible. Today guys you make a person happy. Feel good about that.
Attachments
Not really...
and ... that is a one-time-only operation.
- i have burned the image(gz compressed file) file from puredsd.ru to an sdcard.
- inserted the sdcard in the BB(B/G)
- powered up via usb WHILE i was keep pressed S2 button (is on the bb).
- There's 4 led on the board, after the 4 led "waved" (they lights up in sequence) i have released the button.
at this point you have succesfully booted BB(B/G) from SDcard.
then
- found out what ip address the dhcp server assigned to the BB. (i have discored by looking at the dhcp lease table on my router... but you can use other tools, like "angry ip scanner")
- fired putty up (putty is terminal client that works for protocols like ssh/telnet/serial) and connected via ssh to the ip address discovered.
-> user : root
-> pass : root
then i was in the shell (#)
To make the OS permanent on the 4GB integrated flash i have launched :
/opt/tools/SD_to_eMMC.sh .
after some time the procedure ended and i was able to reboot without the sdcard inserted.
Pavel already did all the hardwork for us and on the image we already have the network audio adapter (NAA) for hqplayer and roonbridge for roon.
so you are 99% ready to go
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Excellent result and nicely executed build.
Will you consider the Lundahl transformers in the future?
What rate DSD are you feeding it with?
I am glad that this project continues to live and pleases the new owners of DSC2.
I believe that the success of this DAC is in its complete neutrality. It does not add any color to the sound.
But thanks to modern powerful computers we have the opportunity to use truly unique software - HQPlayer. I highly recommend using this particular player. HQPlayer is a unique product that allows you to get a magical sound. And DSC2 simply transmits it absolutely exactly and without its own coloring.
I have a small request to those who repeated the DSC2 on their own. And he wants the project to continue development. The DSC2 project is not commercial, and it is difficult for me to devote a lot of time to supporting and creating a quality website http://puredsd.ru
Can anyone take on a little work to change the design on http://puredsd.ru
and with detailed instructions for beginners?
Let's make this project better together!
I believe that the success of this DAC is in its complete neutrality. It does not add any color to the sound.
But thanks to modern powerful computers we have the opportunity to use truly unique software - HQPlayer. I highly recommend using this particular player. HQPlayer is a unique product that allows you to get a magical sound. And DSC2 simply transmits it absolutely exactly and without its own coloring.
I have a small request to those who repeated the DSC2 on their own. And he wants the project to continue development. The DSC2 project is not commercial, and it is difficult for me to devote a lot of time to supporting and creating a quality website http://puredsd.ru
Can anyone take on a little work to change the design on http://puredsd.ru
and with detailed instructions for beginners?
Let's make this project better together!
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For example, gionag described the process of installing the firmware in great detail and is understandable for beginners. And it looks better than my manual on http://puredsd.ru.
Unfortunately, writing instructions and writing documentation is hard for me.
Unfortunately, writing instructions and writing documentation is hard for me.
Thanks mate....
at the moment i still trying to decide what is best for my ears.
hqplayer @ DSD512 with polysinc-mp and AMSDM7 512+fs is feeling good...
but also the roon resampler @ 512 seems good to me.
the cpu utilization is under control... i have an i7-6700k overclocked at 4.9ghz... and i am around 30% with hqplayer configured as above.
Still experimenting ...
Not really...
and ... that is a one-time-only operation.
- i have burned the image(gz compressed file) file from puredsd.ru to an sdcard.
- inserted the sdcard in the BB(B/G)
- powered up via usb WHILE i was keep pressed S2 button (is on the bb).
- There's 4 led on the board, after the 4 led "waved" (they lights up in sequence) i have released the button.
at this point you have succesfully booted BB(B/G) from SDcard.
then
- found out what ip address the dhcp server assigned to the BB. (i have discored by looking at the dhcp lease table on my router... but you can use other tools, like "angry ip scanner")
- fired putty up (putty is terminal client that works for protocols like ssh/telnet/serial) and connected via ssh to the ip address discovered.
-> user : root
-> pass : root
then i was in the shell (#)
To make the OS permanent on the 4GB integrated flash i have launched :
/opt/tools/SD_to_eMMC.sh .
after some time the procedure ended and i was able to reboot without the sdcard inserted.
Pavel already did all the hardwork for us and on the image we already have the network audio adapter (NAA) for hqplayer and roonbridge for roon.
so you are 99% ready to go
I managed to do all of that, and even transferred all to emmc. The bbb starts well, but when I try to stream some music from my HQplayer, the player does not start, the following is what I get from the networkplayerd when started from the console (I had to stop it as a service to see what was going on):
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 6144000/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 8192000/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 11289600/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 12288000/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 16384000/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 22579200/1/2
[/usr/sbin/networkaudiod] (362): ALSA DSD format available: 24576000/1/2
[/usr/sbin/networkaudiod] (362): start 176400/32/2 [pcm]
[/usr/sbin/networkaudiod] (362): Set channels: 2 (2)
[/usr/sbin/networkaudiod] (362): Set sampling rate: 176400 (176400)
[/usr/sbin/networkaudiod] (362): ALSA engine starting...
[/usr/sbin/networkaudiod] (362): ALSA channels: 2 - 4
[/usr/sbin/networkaudiod] (362): ALSA active channels: 2
[/usr/sbin/networkaudiod] (362): ALSA number of periods: 4
[/usr/sbin/networkaudiod] (362): ALSA period times: 22 - 557279
[/usr/sbin/networkaudiod] (362): ALSA period sizes: 4 - 98304
[/usr/sbin/networkaudiod] (362): ALSA period time: 100000
[/usr/sbin/networkaudiod] (362): ALSA period size: 17640
[/usr/sbin/networkaudiod] (362): ALSA engine started at: 176400 (176400)
[/usr/sbin/networkaudiod] (362): enter streaming mode
[/usr/sbin/networkaudiod] (362): ALSA engine running...
[/usr/sbin/networkaudiod] (362): push to queue timed out!
[/usr/sbin/networkaudiod] (362): begin disconnection
[/usr/sbin/networkaudiod] (362): ALSA engine stopping...
[/usr/sbin/networkaudiod] (362): ALSA engine stop request...
[/usr/sbin/networkaudiod] (362): clALSAMiniEngine::Stop(): snd_pcm_wait()
[/usr/sbin/networkaudiod] (362): snd_pcm_drain() failed: (-5) Unknown error -5
[/usr/sbin/networkaudiod] (362): ALSA engine stopped
[/usr/sbin/networkaudiod] (362): ALSA backend uninitialized
Does anybody knows what is going on ? I am using HQplayer 3.24. The BBB does not have connected the DSC yet.
The same setup does work using NAA on a Windows machine, or even a raspberry, so the player seems to be OK
cheers
Pepe
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