What is AUX?

3 Answers
JessicaLynn
07/29/25 2:05am
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 inserted with a USB flash 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 labeled headphone jack). Aux is the abbreviation for Auxiliary, which is an additional signal line design. In general audio equipment, in addition to the formal 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 for 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 through 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, enabling 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 and line backup functions for hardware products 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 know how, you can consult the product's official website or call for assistance.
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SkylarMarie
08/12/25 12:04pm
This thing is the AUX port in the car. I often use it to connect my phone for playing music—just plug in an Aux cable. Simply put, it's an auxiliary input, kind of like an old-school headphone jack, allowing you to connect your phone or other players to the car stereo. If the stereo doesn’t have Bluetooth, this thing is a lifesaver. I find the sound quality decent, but it can produce static if the connection is loose, so check if the plug is secure. Some people ask me, what’s the difference between Aux and USB? Well, USB is more versatile—it can charge and transmit audio, but Aux only transmits music. I’d advise not using it for too long to avoid draining the car battery. It’s great for driving, but be careful not to get distracted when changing songs—safety first.
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VanRachel
10/02/25 3:33am
I'm quite familiar with this music trick – the Aux is like a little assistant for car audio systems. I love using it to connect my phone and play music during road trips; it feels more stable than Bluetooth, especially in mountainous areas with weak signals. The operation is simple: just find the round jack on the center console and plug in the cable. Many modern cars also come with USB ports, which can be used alongside the Aux. The best part is it's cheap and practical – an Aux cable costs just a few bucks. But a word of caution: don't keep the external playback on for too long, as it may affect the car battery. Also, remember to unplug the cable when parked to prevent port wear. Overall, it's super convenient and makes trips more enjoyable.
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