音频接口（Audio）
From ESS-WIKI
Audio (AUDIO)
RSB-4710 supports Line-Out, Line-In, Mic-In, and Speaker-Out. Earphones should not be connected to the Line-Out pin header. If earphone functionality is required, an amplifier must be added, and the microphone connected to the Mic-In pin header. RSB-4710 also supports a mono speaker (2.8W 4Ω or 1.5W 8Ω). Use a cable (Advantech part number: 1700031093-01) for Line-Out and Mic-In tests.The audio connector pins are defined below
| Pin | Pin Name | Pin | Pin Name |
| 1 | LOUTRC_M |
2 | LOUTLC_M |
| 3 | NC | 4 | NC |
| 5 | GND_A |
6 | GND_A |
| 7 | MIC_IN1_P |
8 | MIC_IN1_N |
| 9 | LINE_IN_R |
10 | LINE_IN_L |
| 11 | SPO_P |
12 | SPO_N |
