question

[munjeni]

Hallo!

I very interested in building some variants and want to ask for your experience if possible. I have found 3 variants:

1. https://audiophilediyer.com/discrete-r-2r-dac-hat-for-raspberry-pi/
2. http://puredsd.ru
3. http://www.audiodesignguide.com/DSC2/index.html

Can you tell me did you triend all 3 variants and what you think in your opinions is the best one (related to r2r implementation only)? Thanks for response!

[smdjeff]

Ladder DACs go back to at least the 1950s.
The Pi hat looks to be the cleanest implementation if you're after audio.
The other two versions use 595s as IO expanders so they might be related.
And this one by @dilshan is a bit simpler(cleaner) as it uses GPIOs directly.

[munjeni]

I think r2r is at the last, the better one is that which have current mode moving average implementation as done in DSC dac, a lot less noise in comparation to r2r technology, but it reguire DSD bitstream. We have done direct digital power dac DDPD with success and amazing sound, more info https://www.diyaudio.com/community/threads/ct7302pl.357501/page-4

[natil79]

Hi, nice work,, I would like to build it, but I would like to use it whitout Raspberry pi, could you tell me what frequency I2S source it can handle?

Thank you for your help!