Sensoray 819 - Manual (Page 9)

Audio input, 40-pin 0.1” header.
Pin Signal Pin Signal
1 GND 21 Audio in 1
2 GND 22 Audio in 2
3 GND 23 Audio in 3
4 GND 24 Audio in 4
5 GND 25 Audio in 5
6 GND 26 Audio in 6
7 GND 27 Audio in 7
8 GND 28 Audio in 8
9 GND 29 Audio in 9
10 GND 30 Audio in 10
11 GND 31 Audio in 11
12 GND 32 Audio in 12
13 GND 33 Audio in 13
14 GND 34 Audio in 14
15 GND 35 Audio in 15
16 GND 36 Audio in 16
17 GND 37 reserved
18 GND 38 reserved
19 GND 39 reserved
20 GND 40 reserved
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