Pc -> Dac, How ?

[ejaouen]

To me ADAT is the perfect simple way to do it, with the inherent bonus of electrical isolation between pc and dac.
The only thing still needed is a small diy board around wavefront AL1402G chip near exactly as described in its datasheet. This is very simple but still too complicated for me being a newby in creating circuit boards and soldering ICs.
I hoped the twisted pear guys would be interested in this project...

I will probably end up making it on a stripboard with a "soic to dip adapter" but this going to be a long task, knowing how fast and experimented I am...

[Telstar]

Originally posted by ejaouen
To me ADAT is the perfect simple way to do it
...

Isn't ADAT limited to 16/44.1k per channel?

[ejaouen]

44100 or 48000hz is the limit yes (if you want the 8 channel possibility) ; but you can have smux which doubles the hz at the cost of reducing the number of channels.
Personnaly I have hard time hearing more than 20000hz so 44100hz sampling is enough !

ADAT is 24 bit capable (not 16bit only)

So I do not see any real limitation in ADAT.
Would it be 16bit limited then yes ADAT would be worthless...

[Telstar]

Originally posted by ejaouen
44100 or 48000hz is the limit yes (if you want the 8 channel possibility) ; but you can have smux which doubles the hz at the cost of reducing the number of channels.

So, from a board like the RME with 8 ADAT channels you could have 2 24/192k channels (if you find a way to do that)?

[padam]

My opinion is that the DAC used&implemented is more important than the resolution, I am perfectly happy using USB.

[Hurtig]

Is this thread gonna end up with some construction, or just a lot of talkin???

[ejaouen]

Hi hurtig,
Design me my AL1402G pcb and discussion is finished ! (I prefer through hole components when possible) : many asking PC to DAC how will have the answer from you !

Bonus : AL1402G chip is inexpensive

Telstar :
All recent adat RME cards have smux working and I think there is a document on wavefront website explaining how to make their AL1402G ADAT receiver chip accepting smux. You can have four channel 96k or stereo 192k.

[lnekhamkin]

Originally posted by Hurtig
Is this thread gonna end up with some construction, or just a lot of talkin???

Same question here. Are we making any real progress after 6 months worth of conversation?

[mr.duck]

Same question here. Are we making any real progress after 6 months worth of conversation? [/B]

How about using existing solutions and making the best of it? Like a pro USB audio interface (doesn't need to be expensive)... with optical spdif output. Just except that it's going to be jittery as hell and clean it up later like with a spdif or IIS reclock module. Optical is nice because it isolates things electrically.

[lnekhamkin]

The problem with this approach is to properly clean jitter, downsteam
device or devices will have to be expensive