CJMCU 5102 DAC module

This inexpensive DAC module can be found on AliExpress and other places like eBay for very little money. It features the Texas Instruments PCM5102A on a small breakout board with integrated 3.5mm jack.

Pinout

Connect your module to the Raspberry Pi as follows:

CJMCU-5102 pin	Physical Raspberry Pi pin	BCM pin
VCC	2	N/A
3.3V	N/A (unused)	N/A
GND	6	N/A
FLT	9 (unused, grounded)	N/A
DMP	14 (unused, grounded)	N/A
SCL	20 (unused, grounded)	N/A
BCK	12	18
DIN	40	21
LCK	35	19
FMT	25 (unused, grounded)	N/A
XMT	1 (unused, pulled high)	N/A

mt32-pi setup

This DAC requires no special configuration; simply enable I²S output in your mt32-pi.cfg:

[audio]
output_device = i2s