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Soren's R-2R Dac

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MisterRogers:
Hey Gang,


Brought up the R-2R DAC today. In an effort to use what I had available, it's more complicated than it needs to be for Soren's fantastic board. I'm using a 12V S03 to power the clean ISO side of the DAC, with 2 Reflector-D's (5V, 3.3V) to power the Sonore USB->I2S board, and supply the ISO 3.3 (dirty side) for the R-2R. The 2 Reflektor-D's are sharing a transformer, as they're powering the clean side of the Sonore, and the dirty side of the R-2R Iso. Unnecessary double rec-clocking going one - plus the top of the line oscillators on the Sonore are of little benefit...


I'll probably drop in an Amanero and save the Sonore for a different application.


Listening now, sounds very nice. R-2R's sure have a distinctive sound. More impressions later - need to take it in for awhile.

Priidik:
Awesome!

I wonder if the DAC ladder out would sound better than the balanced IC out?

MisterRogers:
Good question - I'll give it a try soon. First I'll swap out the Sonore board for an Amanero; that will let me drop the 3.3V PS. In 'theory', I shouldn't hear any difference. As this board can also accept a 7V AC transformer directly, I'll give that a try too. The S03 board is just serving a a pre-reg, so it's probably overkill too. So lots of testing / playing to do still. Overall though, It's a pretty damn good sounding DAC. Some of the most notable aspects (sonically):
* Good spatial imaging. Very precise.
* Good tonality.
* As you would expect from an R-2R, very good attack / decay.

Hroðulf:
I might be able to test mine out today. My part providers have been extremely slow lately.

Btw, are you having "plops" on Fs change?

MisterRogers:
No, just a very slight 'tick' noise on sample rate changes. Probably has a lot to do with the USB / I2S receiving being used, and how it's handling rate changes.

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