Ian Dac

Bought some boards from Ian Canada from diyaudio

Docs

https://github.com/iancanada/DocumentDownload

Boards are

FifoPi Q2 Ultimate

ESS controller

Dual ES9038 dac

CCHD957 XO adapter kit

LT3042 low noise regulator

Docs

https://github.com/iancanada/DocumentDownload

Need to upgrade clock.  If you only use DSD and CD, can only upgrade the 45.1584 MHz clock

I used this NKD clock

https://www.diyinhk.com/shop/audio-kits/128-ndk-nz2520sda-33v-49152mhz-451584mhz-24576mhz-225792mhz-ultra-low-phase-noise-oscillator.html

Another option is this Crystek PN CCHD-957-25-45.1584

from Digikey

https://www.digikey.com/product-detail/en/crystek-corporation/CCHD-957-25-45.1584/744-1458-ND/2742157

I used a SOT-23-6 adapter I bought from ebay a while ago to install the tiny NDK clock to.

Make sure the dot on the clock is oriented to the square pad on the adapter.

That adapter board solders directly to Ians clock adapter board

https://github.com/iancanada/DocumentDownload/tree/master/Adapters/CCHD957adapterKIT

Install caps on adapter board first, then to install SOT-23 adapter I put solder on the pads of Ian's adapter, then solder in the holes of the SOT-23 adapter, put the boards in position as shown below, then heated the holes up to flow the solder together.  Didn't use any wires.

Then installed the pins as described in instructions and ready to use.

https://github.com/iancanada/DocumentDownload/blob/master/FifoPi/FifoPiUltimateManualV1.0.pdf 

J6, J11: MCLK outputs (U.FL coaxial cable socket) 

MCLK (master clock) output for DAC HAT or external DAC. To operate a DAC (HAT or external) in synchronized clock mode you must connect this to your DAC. J11, a second MCLK output socket, is located at the bottom side of PCB. 

12     SCK Input 

35     LRCK Input 

40     SD/D2 Input