Audio Signals
Stereo signals contain left and right channel information and are used for most audio signals.
A mono signal is used for the microphone input to the APIM. The mono signal is also used for the voice prompts, the TTS feature, ringtones, and any audio received through a connected mobile phone. These audio signals are output from the APIM to the ACM. The mono output from the APIM utilizes separate circuits from the stereo output.
A digital signal transmits data from a media device connected through the USB port to the APIM. The APIM then converts the signal to analog and relays the signal to the ACM.
A wireless signal broadcasts audio signals from a Bluetooth media device to the APIM, which converts the wireless audio signal to analog and relays it to the ACM.