Dual Core: Pure PCM and Pure DSD fully discrete.

[chientechnical]

I am starting to launch the project "Dual Core - NOS DAC DISCRETE". It's support to PCM (max 768Khz) and DSD (max 512) both.

Each core is processed for PCM and DSD separately. Each core has 2 different channels.
So, I have 2 cores and 8 threads in total. This seems very fun by my definition

PCM Core: Pure PCM R-2R used 74LVC595 (3.3V) or 74AHCT595 (5.0V), schematic folow by Shift Register same as Soekris.

DSD Core: Pure DSD Ladder used 74LVC595/74AHCT595 too, it's base on open hardware of Signalyst DSC1.

This DAC is only suitable for Amanero, BBB (Botic Driver) or similar if they have DSD_En and Mute pins.

Below are schematic (incomplete/draft) and layout of all part for quick view.
Please let me know your thoughts on these crazy ideas

Schematic: DUAL-CORE-R2R (SCHEMATIC).pdf - Google Drive

Layout: DUAL-CORE-R2R (PCB).pdf - Google Drive

 

[Zoran]

Sorry
- MSB for I2S should be inverted.
- Try to avoid metastabile state of flip flops insted of parallel (one FF) should be serial.
- For I2S LE going one sck, prior to the MSB, without that it is for Left Justified format and You will loose MSB