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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 KHz

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#5,323
Philipp23 said:
Besides that it is off topic. What is the problem about the list? It is just a top list from a guy who subjectively valued different devices in his audio system configuration. It is just his own subjectively ranking, it is nowhere said that this is a general list that is valid for all devices and system configurations.
Click to expand...

The problem is that it is subjective, which may be useful for himself, but for subjective is no other useful.
 
#5,326
hop.sing said:
Hi
Is there any advantage in using the buffered outputs of the dam symmetrically instead of single ended to feed my HD580 headphones?
Click to expand...

If you can wire them this way you can indeed run them balanced, eliminates the common ground on the output at least and will have a higher output swing.

Try it and report back. I use HD800's in a similar setup but with dual boards. Plenty of juice to drive loud volumes.
 
#5,327
spikestabber said:
If you can wire them this way you can indeed run them balanced, eliminates the common ground on the output at least and will have a higher output swing.

Try it and report back. I use HD800's in a similar setup but with dual boards. Plenty of juice to drive loud volumes.
Click to expand...

Higher output sounds good...on a quite (eg some passages with Mahler) recording, I would like to have more juice, especially since I locked the max volume at 0dbfs with a resistor in front of the volume pot. Thanks, i will try and report back.
By the way, is there a standard pinout with the 4 pin xlr plug? It would be nice to be compatible with those highend cables from sennheiser etc
 
#5,328
hop.sing said:
Higher output sounds good...on a quite (eg some passages with Mahler) recording, I would like to have more juice, especially since I locked the max volume at 0dbfs with a resistor in front of the volume pot. Thanks, i will try and report back.
By the way, is there a standard pinout with the 4 pin xlr plug? It would be nice to be compatible with those highend cables from sennheiser etc
Click to expand...

There's really not, but I think the AKG-1000 pinout is considered the standard for a 4 pin xlr.
 
#5,332
soekris said:
People keep asking for how to do AES/EBU interface....

My new recommendation is to use a RS-422 receiver, both for AES/EBU and for Coax. First a transformer, like the Murata DA101, with correct termination resistor, 75R or 110R, then to a Maxim MAX3280E or Intersil ISL3280E, power 3.3V with decoupling, then into the dam1021's ttl level spdif input port.

Pretty simple, if you need multiple ports, add more receivers and a switch.
Click to expand...

Hi Soren,

Thanks a lot! This is what I am looking for long time.

May I ask, if I am going to connect two dam in balance mode, would the above configuration also applies without any modification needed?
I found that when following the manual to connect RCA S/PDIF to S/PDIF1+/- input, the signal may loss sometimes. I dont know do I need to change something for the case of S/PDIF1 when I am connecting two dam. Would you be kind enough to tell the connection scheme for the case of S/PDIF1 in balance mode dam cards?
 
#5,333
kenneth_obee said:
Hi Soren,

Thanks a lot! This is what I am looking for long time.

May I ask, if I am going to connect two dam in balance mode, would the above configuration also applies without any modification needed?
I found that when following the manual to connect RCA S/PDIF to S/PDIF1+/- input, the signal may loss sometimes. I dont know do I need to change something for the case of S/PDIF1 when I am connecting two dam. Would you be kind enough to tell the connection scheme for the case of S/PDIF1 in balance mode dam cards?
Click to expand...

Yes, using the RS-422 buffer simplify things, you can just connect the buffer output to both boards spdif ttl input.
 
#5,335
Dimdim said:
I've had DIYINHK's board for a few months now.

I can say that it definitely works, but I can not offer any subjective SQ impressions.

I haven't used it on the Soekris. I doubt it will sound any different than the older XMOS boards.

The OLED sure is cool though. 😛
Click to expand...

Dimdim,

You may be referring to the previous implementation, (the green multichannel board)?
The new implementation, (blue board) has 45.158Mhz and 49.152Mhz oscillators and optimized firmware to provide DSD 512 or more.

I am using the green board also, but the 500 Mips version is more suited to the Soekris. I was tempted to try the blue board, but the JLSounds I2SoverUSB looks quite attractive...
 
#5,336
Yes, I am referring to the green board, but I still maintain that the faster clocks (but of same quality I assume) should not make an audible difference on the Soekris.

So I am not really tempted to try it on my Soekris.

The JLSounds I2SoverUSB is a solid design, but I wouldn't recommend it for the DAM1021 because you have to use its on-board isolator.

However, it will be excellent for the 1121 when it comes out.
 
#5,337
soekris said:
People keep asking for how to do AES/EBU interface....

My new recommendation is to use a RS-422 receiver, both for AES/EBU and for Coax. First a transformer, like the Murata DA101, with correct termination resistor, 75R or 110R, then to a Maxim MAX3280E or Intersil ISL3280E, power 3.3V with decoupling, then into the dam1021's ttl level spdif input port.

Pretty simple, if you need multiple ports, add more receivers and a switch.
Click to expand...

Hello Soekris and all other DAM owners

Can you or some other DAM owner create a little PCB for the RS-422 Receiver AES/EBU and SPDIF interface? Then everybody can order the PCB from his favorite PCB manufacturer. If interest is high enough I would maybe manage a group buy. Or would you offer such an add on PCB in your Europe and American stores?

Kind Regards

Phil
 
#5,338
Hi Soren,

Will you consider adding a command to set "invert" mode by a new command? Currently there're four modes: "normal", "invert", "bal-left" and "bal-right". Why I am asking this arrangement for "invert" is because when the dam is already in balance left or right, it can't be inverted by uManager command.

Some classical records are better played with inverted, so please kindly consider change the "set mode" command so that even when the dam is set as bal-left/bal-right, it can still set as "normal" or "invert". Thanks
 
#5,339
I worry that I have misunderstood what INVERT means in the SOEKRIS firmware.

I thought, and have repeated my thought, that INVERT in this case meant switching channels. I felt sure I had read this somewhere but now I have my doubts.

Does INVERT actually mean reversing the polarity of the outputs? If it does I guess I am going to have to learn how to use this without having a computer sitting next to my system!

dimdim, does your controller allow this to be used?
 
#5,340
rickmcinnis said:
I worry that I have misunderstood what INVERT means in the SOEKRIS firmware.

I thought, and have repeated my thought, that INVERT in this case meant switching channels. I felt sure I had read this somewhere but now I have my doubts.

Does INVERT actually mean reversing the polarity of the outputs? If it does I guess I am going to have to learn how to use this without having a computer sitting next to my system!

dimdim, does your controller allow this to be used?
Click to expand...

Thanks Rick. If that's the case, please ignore what I said above. I thought it is about inverting the phase of analog signal. Sorry about that.
 
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