discrete dac mock up

[kkerwin]

hi yeo, have you campered the two:  i2s straight in, and spdif to converter to i2s out?  is there any difference in the sound?
thanks
k

[yeo]

hi kevin

i didn't compare here but i would believe i2s in still wins.

btw, i did a write- up on discrete monica on the site.

yeo

[cw]

Discreet Monica  
Her name sounds good, but ...   

[kkerwin]

hi yeo,

if i want to experiment with the i2s out from qa550 and in to discrete monica, do i need to go through the black crow, o does it connect directly?

thanks
k

[yeo]

hi kevin

you could wire directly. only problem is....

i2s from qa550 is not buffered. if the wires are long, you'll get distortion. keeping it short to less than a foot is okay.

yeo

[kkerwin]

I
Can keep it short, currently qa550is about 1.5cm pfrom black crow.  I will try this to see if there is a difference.
Thx
K

[CKL]

Hi Yeo,

I wonder if I could mod the older version to output I2S?

[yeo]

hi ck

you could but it's not easy.



these are pins 25/26 on dir9001. they are wired to ground to set the output to eiaj.

to set to i2s, these 2 pins must be tied to high, say pin 5 (vcc) of the chip. or you could tie to pin 24 (vcc).

yeo

[CKL]

Hi Yeo,

I'll try it and how about the setting of the clock frequency? Thx

[yeo]

clock freq has nothing to do with i2s.

setting both psck0/1 to h sounds better. worth a mod.

yeo

[kkerwin]

hi yeo,
i would like to verify a couple of questions about hooking up the i2s out from the qa 550 to the discrete monica.  i have attached a diagram that shows the pin configuration on monica and the qa 550. 
thanks
k

[yeo]

hi kevin

you got the 3 pins right.

Word Select is meant to be hooked up to Left Right Clock.

yeo

[CKL]

Review of another discrete DAC:
http://www.6moons.com/audioreviews/totaldac3/1.html

[kkerwin]

hi all,
discrete monica fed by i2s from the qa 550 is outrageous. 
thanks yeo.
k

[kp93300]

Hi All,
I have been enjoying the dac for a while and is thinking about some mods.
i have the Ad 815 pre that I like very much .  The dynamic is excellent !
I am thinking of using the Ad 815 in place of the B1 buffer on board and use a dc servo to control the dc output.
I got the idea from this thread and the post by Rudi. 

http://www.diyaudio.com/forums/chip-amps/40783-re-searching-better-preamp-19.html    see post 183.

Will this work ? I have an input caps n the amp also.


I Please comments

regards

kp93300