What is the function of the AUX in a car?

[VonValentina]

AUX is an audio input interface. The basic working principle of the AUX interface is that after connecting to the AUX interface, the audio in electronic products can be connected to the car audio through the headphone jack and AUX interface, and the audio can be played in the car audio broadcasting facilities. The USB interface can be used to insert a USB drive to play audio. When using it, insert one end into the AUX interface and connect the other end to a video player such as a mobile phone, MP3, or MP4. This allows you to listen to songs or niche music anytime and anywhere, not limited to car music CDs. However, if the playback device runs out of power, the music will also stop (the interface is generally a 3.5mm standard headphone jack). Aux, which is short for Auxiliary, is an additional signal line design. In general audio equipment, in addition to the official output and input terminals, there are often several terminals labeled Aux as standby connection terminals. When there are special applications, such as additional sound output or input, this type of terminal can be used. These standby terminals or lines, whether input or output, are collectively referred to as Aux. Function: The AUX port is an asynchronous port, mainly used for remote configuration, dial-up connections, and can also be connected to a MODEM via a transceiver. It supports hardware flow control. The AUX port and CONSOLE port are usually placed together because their respective applicable configuration environments are different. The AUX interface establishes a command-line connection between the user and the device, allowing operations that are usually impossible in user mode, such as initialization, restoring initial configurations, and correcting abnormal user modes. It provides a fixed port for the device, which can be used as a standard asynchronous serial port with a maximum speed of 115200bit/s. Using the AUX interface, remote configuration of hardware products and line backup functions can be achieved. Note: When using the AUX interface, make sure to buy the correct connecting cable and avoid plugging the audio cable into the wrong port. It is best to follow the steps in the product's user manual when using the AUX interface. If you still don't understand, you can consult the product's official website or call for assistance.

[DeBarrett]

I love using the AUX port in my car the most because it allows me to directly connect my phone or MP3 player to the car stereo to play music. Simply put, the AUX port is an auxiliary input jack—that little hole in your car where you plug in a 3.5mm audio cable, with the other end connected to your device, instantly playing my own playlist or podcast. It's fantastic for music lovers, freeing me from relying on radio ads or fixed playlists, and the sound quality is much more stable than Bluetooth with no lag, especially during night drives or long trips. I often use Spotify to play new songs, but I have to be careful not to drain my phone's battery too quickly or let the cable get tangled. Though old-school, AUX has broad compatibility, breathing new life into older cars. Just remember, it only transmits audio and can't control the device—answering calls requires another method—but overall, it doubles the fun of driving. Using a cotton swab to clean the port during routine maintenance can prevent connection issues.

[StAdalynn]

As a parent who drives with kids, the car's AUX port has been a great help. Its function is to connect external devices to the car's audio system via an audio cable, such as playing children's stories from a phone to soothe the kids. I connect my iPhone to play educational content or nursery rhymes, and the children stay much quieter during rides, without causing distractions or noise. The setup is incredibly simple: just plug the cable into the car's AUX port, and it starts playing—much easier than pairing via Bluetooth. While driving safely, the audio controls automatically, without interfering with driving. Every week, I use the AUX to play music during school drop-offs, making the trips enjoyable. Although AUX is an older technology, it's reliable and valuable in non-smart cars, though the cables can wear out easily, so it's wise to keep a spare. Overall, it enhances the family car experience, making car rides more enjoyable for the kids.

[LaBlakely]

Common aux troubleshooting cases in car repairs. The aux function is to input external audio sources such as smartphones into the car's audio system. When assisting customers in the workshop, common issues include oxidation or dust in the jack causing no sound, which can be resolved by replacing the cable or cleaning it. The aux uses a 3.5mm jack to connect devices for music playback, allowing car owners to personalize their listening experience with old songs or news. Compared to newer systems, it is simple and cost-effective, avoiding complex setups. It is recommended that car owners regularly gently clean the jack to prevent static damage to sound quality and avoid pulling the cable forcefully. Maintenance is convenient and low-cost, enhancing the practicality of older vehicles.