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