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What Is Aux? What Is Aux Used For?

by Mubi 

What is aux?

“Aux” is short for “auxiliary.” In audio items, like speakers or headphones, it means extra inputs and outputs to connect other devices, like your phone or a music player. Let’s learn more about aux in this article.

“Aux” stands for “auxiliary,” which means extra. In audio gadgets like speakers or amplifiers, “aux” is like having extra plugs where you can connect other things, like your phone or a music player. It lets you play sound through the speakers or other audio equipment from those devices

“Aux in” or “Line in” is like a special spot on your music player where you can plug in your phone or laptop. When you plug in, the music from your device can play through bigger speakers or a fancy audio system, making it sound much louder and cooler!

Before we learn about the different types of aux cables and explore their uses, let’s first answer the primary question, “What is aux?”

What is aux?

What is aux?

Auxiliary, or aux, is a word used in audio stuff. It means a special connection that lets you plug into big speakers like phones, tablets, or laptops. You use a special cord to connect them. One end goes into the speaker, and the other goes into your device. This way, the sound from your device comes out of the big speakers and sounds much louder!

Aux inputs are like magic plugs in car radios, home theaters, and big speakers. They let you connect your phone or music player to these devices, so your music can play loudly and sound really good. Musicians and people who work with music also use these plugs to connect their instruments and microphones to big sound systems. It’s like having a special key to make music sound awesome everywhere.

Aux inputs used to have wires, but now we also have a cool thing called Bluetooth that lets us play music without wires. However, people still like using aux inputs because they work well with many devices. Besides inputs, some outputs send sound to other devices like recording equipment or big speakers. This helps professionals, like musicians, make their music sound really great!

What are the different types of aux?

There are different types of aux connections made for different gadgets and jobs. Let’s explore the different types of aux connections and their functions:

What are the different types of aux?

  • 3.5mm aux jack
  • RCA aux connections
  • TRS aux connectors
  • Optical aux (Toslink)

3.5mm aux jack:

The 3.5mm aux jack, or headphone jack, is a tiny plug that many devices like phones and speakers use. It helps them connect and play music together. You need a special cable with the same plugs on both ends. It’s like having a special key that fits into many different locks, making connecting different devices and playing music easy.

RCA aux connections:

RCA aux connections use red and white plugs. You might see them in DVD players or game consoles. They help devices like speakers and TVs talk to each other. These cables are easy to find and help the sound go between devices so you can hear it clearly.

TRS aux connectors:

TRS aux connectors are used in fancy music gear and come in different sizes, big and small. They’re found in instruments and headphones. TRS cables have three parts that help sound travel really well. They’re great for studios and live music because they stop annoying noise in long cables, making the music sound good.

Optical aux (Toslink):

Optical aux connections use light to send sound signals. They’re in fancy audio stuff like home theaters and gaming consoles. These cables make the sound really good, especially for surround sound. It’s like a magic light that makes the sound awesome in our home entertainment systems!

What are the different parts of an aux?

Auxiliary inputs and outputs, or aux, are really important because they help connect things like phones and music players to big speakers or other audio systems. They’re like special plugs that make our music play louder and sound great! Let’s explore the different components of an aux setup:

What are the different parts of an aux?

  • Auxiliary port
  • Auxiliary cable
  • Auxiliary input
  • Auxiliary output
  • Volume control

Auxiliary port:

The aux port, also called the headphone jack, is where you plug in the aux cable on your music devices. It’s a small hole, usually 3.5mm in size, where you put the cable to make your music play on bigger speakers or headphones. It’s like plugging in your earphones but for a big sound!

Auxiliary cable:

The auxiliary cable is like a special wire that connects your music player to big speakers or other devices. One end goes into your music player, and the other can fit into different spots, like speakers or older devices. It’s like a bridge that helps your music travel from your player to the big speakers.

Auxiliary input:

The aux input is like a special door on your music system. You can plug in your phone or other gadgets there using a cable. When you do that, the music from your phone plays through the big speakers of your music system. It’s like inviting your friend’s music to play in your house.

Auxiliary output:

The aux output is like a special window in your music system. It sends the music outside to other devices. This is great for professionals who want to make their music sound amazing. They can connect it to recording machines or big speakers to improve the music! It’s like sharing your music with the whole neighborhood!

Volume control:

Some music systems have a special button just for the music you plug in. This button lets you make the music louder or softer without changing the volume of other sounds. It helps you hear your music just right and makes sure everything sounds good together!

What is aux used for?

Auxiliary inputs and outputs, or aux, are like helpers in audio devices. They do different jobs to make our music and sounds play better! Let’s explore the different applications of aux connections:
What is aux used for?

  • External device connectivity
  • Professional audio setups
  • Integration of audio devices
  • Live sound productions

External device connectivity:

Aux connections help us connect our phones or music players to big speakers or music systems. We use a special cable to link them. When we do this, the music from our devices plays through the big speakers, making it sound loud and awesome. People often use this in cars, home theaters, and portable speakers to enjoy their favorite music or podcasts with great sound!

Professional audio setups:

In the music world, aux connections are like magic wires. Musicians use them to make their instruments sound really loud and perfect. DJs use them to switch between songs smoothly. Sound experts use them to send sounds to other devices for recording or listening carefully. Aux connections help everyone in music make their sounds amazing.

Integration of audio devices:

Aux connections are like special plugs that help us connect different gadgets to our sound systems at home. We can plug in a music player and a TV at the same time, without changing everything. This makes it easy to switch between them and makes our setup more convenient and flexible. It’s like having different channels on the TV remote – you can pick what you want to watch without a big fuss.

Live sound productions:

In live concerts, musicians use aux connections to hear themselves better on stage. They connect special speakers to the sound mixer. This way, each musician can hear their music and the band clearly, making their performance sound great to the audience! It’s like having special music in your ears while playing on stage!

What are the reasons behind the malfunctioning of your aux?

Sometimes, aux connections can have problems that stop them from working correctly. Let’s explore common reasons for aux malfunctions:

  • Cable damage
  • Loose connections
  • Dirt or debris
  • Device compatibility
  • Software or wetting issues
  • Physical damage

Cable damage:

Sometimes, the aux cable can stop working if it’s damaged from bending or pulling. This can make the sound bad or silent. We need to replace the broken cable with a new, good one to fix it. It’s like getting a new, strong rope if the old one breaks.

Loose connections:

If your music suddenly stops or sounds weird, it might be because the aux cable isn’t plugged in properly. Check if both cable ends are tightly connected to your device and the music system. If it’s loose, push it in again. It’s like ensuring both ends of your puzzle piece fit snugly – everything works perfectly!

Dirt or debris:

Sometimes, tiny bits of dust or dirt can get inside the aux port and make the music sound strange. You can clean it by blowing air or using a small brush, but be gentle! We don’t want to break anything. Cleaning helps the music keep playing smoothly, just like making sure our toys are clean so they work well.

Device compatibility:

Sometimes, the aux cable might not work because it’s not the right kind for your device. It’s like trying to fit a square block into a round hole – it just doesn’t work! It would be best if you made sure the cable matches your device. You can check the manuals or ask for help to be sure everything fits properly, just like how we need the right key for the right lock!

Software or settings issues:

If you can’t hear your music through the aux connection, it might be because of settings on your devices. Imagine your music player has a switch between headphones and speakers. You won’t hear anything if it’s set to headphones, but you’re using speakers! Check your music player and speaker settings to ensure they match. It’s like ensuring you’re using the right remote control for your TV – the right buttons must be pressed.

Physical damage:

If your aux plug or socket looks broken, with bent parts or pieces missing, it might not work. It’s like a broken puzzle piece that won’t fit. In that case, you should ask a grown-up to help fix it or get a new one so your music can play again properly!

How do you fix a broken aux?

If your music connection isn’t working, there are ways to figure out what’s wrong and try to fix it. It’s like when your toy stops working, and you try different things to make it play again! Let’s explore the process of fixing a broken aux connection:

How do you fix a broken aux?

  • Inspect the cable
  • Check device compatibility
  • Clean the ports
  • Secure the connection
  • Check audio settings
  • Test with another device
  • Professional repair

Inspect the cable:

First, look closely at your music cable. It won’t work properly if you see any broken parts or cuts. You can get a new cable from a store or online. It’s like getting a new string for your kite if the old one is torn. A new one will make your music play without any problems.

Check the device compatibility:

Before connecting your gadgets, make sure they work together. Each device might need a special cable to talk to the other. Imagine it’s like different languages – you must speak the right one to understand each other. Check the manuals or the company’s website to find out which cable your devices need. It’s like using the right key for the right lock – everything fits perfectly.

Clean the ports:

Sometimes, tiny bits of dirt can get inside the plugs where you connect your music. It’s like crumbs getting stuck in a puzzle piece. You can clean them with air or a small brush, but be gentle! We don’t want to break anything. Clean plugs make sure your music plays without interruptions, just like ensuring your puzzle pieces fit together perfectly!

Secure the connection:

Make sure the music cable is pushed in all the way on both sides. If it’s loose, the sound won’t be good. Imagine it’s like making sure your toy’s pieces are stuck together tightly. If something’s in the way, like a phone case, move it so the cable fits properly. That way, your music will play without any problems!

Check audio settings:

Check your gadgets’ settings to ensure they’re sending the sound through the right plug. It’s like making sure your TV is set to the right channel to watch your favorite show. Sometimes, the sound might go to the wrong place, like inside the gadgets instead of the speakers. Adjust the settings so the sound goes to the right plug, and your music will play correctly!

Test with another device:

If your music still isn’t playing right after checking everything, try using a different gadget with the same music cable and speakers. This helps you figure out if the problem is with the cable, your first gadget, or the speakers. If the music plays fine with the new gadget, the issue is probably with your first gadget. It’s like trying a different pen to see if it writes – if it does, then the first pen might be broken.

Professional repair:

If nothing else works and the music is still not playing right, it’s like when your toy is broken, and you can’t fix it yourself, so you ask a grown-up for help. You can call the company that made your gadget or ask someone who can fix things. It’s not a good idea to fix it alone because you might worsen it. So, it’s best to get help from someone who knows what to do!


Auxiliary connections are like magical bridges for our gadgets. They help our devices work together and make our music sound great! Whether connecting our phones to speakers or making sure instruments play well in concerts, aux connections are super important for our music to sound amazing!

If your music has problems with the aux connection, you can try fixing it by checking some things. But if it’s too tricky, it’s better to ask a grown-up for help. Don’t try fixing it yourself, or you might worsen it. By being careful and asking for help when needed, you can make sure your music always plays well and sounds great!

About the author 

Mubi Ace

October 30, 2023

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