According to the schematics : In ver 1606: - I2S is not connected, - analog audio LINEOUT and MICIN1 are connected to CON2 pins 8-11 In ver 1.1, 1607: - I2S is connected to CON2 pins 8-11 - analog LINEOUT and MICIN1 are on connector 'Audio' pins 1-3,5 In both versions, H3 pins LINEIN and MICIN2 are ...