Difference between an Audio Interface and a Mixer!

Last Updated on September 4, 2020 by Facundo

Recording music at home has never been easier, all you need are a couple of simple components that you plug into your computer and you are ready to go.

But this doesn´t mean that any hardware you use will get the job done effectively.

It all comes down to the needs and preferences that you may have.

In this post I will talk about the difference between Audio Interfaces and Mixers, to try and give you a better understanding of which one might be best for you, as well as tell you why using your PC’s built-in sound card might not be a good idea.

Let´s start by asking;

What is the difference between an Audio Interface and a Mixer?

An audio Interface converts the analog signal into a digital one so that it can then be recorded by the Music Production Software.

A Mixer is designed to mix all the incoming signals together, adding effects and other processing and sending them to one or more Output channels.

If that information is enough for you, awesome! If not, then you are going to want to keep reading!

What exactly is an Audio Interface and what does it do?

I already covered this topic quite extensively in my post on what audio interfaces are, which you should definitely check out, but here’s a shorter answer:

An  Audio Interface connects to your PC via either a USB-, Thunderbolt- or a Fire-Wire cable and takes the analog signal that´s coming from the microphone and accurately converts it into a digital one, so that the computer can “understand it” and record it to the DAW.

One thing you will notice when looking at the descriptions of the Interfaces is the number of inputs that they have;

This means, the number of analog inputs that can be sent via USB, Fire-Wire or Thunderbolt to the PC as separate tracks.

These would be the Mic or XLR, Line (low impedance) and Instrument (high impedance) inputs.

The Instrument Input is designed for electric guitar or bass and has a preamp to get the signal up to line level.

The Line-in Input is designed for instruments such as keyboards, amps and other electronic instruments which already provide an “amplified” signal (line level).

One would assume that if the manufacturer claims that his product has 16 channels that this means that the interface has 16 analog inputs, right?

WRONG!

They also include digital inputs such as SP/DIF in the channel count, even though these would need another piece of equipment to to be used, in most cases.

So, if you see an audio interface with 24 channels, it may only be able to handle 8 analog inputs, which means that you would only be able to connect 8 microphones to it.

Audio Interfaces can have few inputs, like the Behringer U-PHORIA UM2, which just features one XLR and one Instrument input, or they can even have 16 inputs like the Tascam US-16×08 (8 XLR and 8 line).

The XLR inputs, or Mic Inputs, have a preamp that amplifies the signal of the microphones since they tend to have a low output capacity.

Also, they provide phantom power in 99% of the cases; Phantom Power (Link to a post I wrote about Phantom Power) is used to power condenser microphones since without it they aren’t capable of producing a high enough signal for recording.

The preamps are important, not only to amplify the signal or to send phantom power to the condenser microphones, but also to keep the noise to a minimum and to achieve the highest audio quality possible.

Cheaper interfaces don’t usually come with the best preamps, however interfaces like the Apollo Twin MKII and the Audient iD14, even though they are much more expensive, have some of the best ones out there and the sound quality is amazing.

In fact, I own the Audient iD14 and it truly sounds fantastic.

Some of the cheaper Audio Interfaces, like the Behringer UM2, tend to have headroom issues, and even when the signal is not clipping the audio starts to sound distorted when it shouldn’t be.

This is why, if possible, you should get interfaces with good preamps.

Related: I Wrote a couple of posts about the best Audio Interfaces both for beginners and experienced users;

Pros of an Audio Interface

  • Portability: Most of them are actually quite small and fit into almost any bag. This is great if you have to move around a lot.
  • Great audio quality.
  • Usually BUS powered.

Cons of an Audio Interface

  • No Equalizers or other effects built-in.
  • Less Control than with a Mixer.
  • Can´t be used for live performances.

Moving on…

What is a Mixer and what does it do?

Also known as Mixing Board, Mixing Console, or Sound Board, a mixer is a very versatile component that can be used from live shows to studio recordings.

At its very core, a mixer takes audio signals and mixes them together sending them to one or more Output channels, making them, if done correctly, sound as intended.

Example;

Imagine you were watching an orchestra conductor who is managing all the instruments and directing the simultaneous performance of several musicians…

This is, in a sense, what it is like using a mixer.

The audio comes in through different input channels where you can adjust the volume, apply EQ, add different effects and create a monitor feed to be able to end up with a harmonious product.

At first a Mixer might appear intimidating and confusing because it has a lot of knobs and faders.

But the good news is that these controls are divided into simple groups that are quite easy to understand;

Every channel has a complete set of controls to itself, which is called a channel strip.

If you know what the controls for one channel do, then you know how the controls for every other channel work, and therefore learning to use one channel strip equates to learning how the entire board works.

Mixers are generally best suited for live performances since not only can they be used to mix the audio, but also to create monitor feeds and headphone mixers for the musicians.

Mixers with a built-in Audio Interface

Now, it’s very important to note that some Mixers can also work as an Audio Interface, if they have one built-in.

This just means that you can record straight to the recording software/DAW on your PC using a mixer instead of needing a separate audio interface.

Important Note: Just because the mixer has a built-in audio interface doesn’t mean that it can record every input to a separate track in the DAW;

Most affordable mixers, say in the $200 range, will only let you record the stereo out to the PC.

This means that all the tracks coming into the mixer will be summed/mixed to one stereo file that will then be recorded.

This is far from ideal for a home studio setting since you won’t be able to process each individual element separately.

On the other hand, Mixers that are capable of Multitrack recording will let you record every individual input to a separate track in the recording software.

And since mixers tend to have a lot more inputs than audio interfaces, you can record whole bands with them.

Using a mixer without a built-in audio Interface to record

Now, let´s say you had a regular mixer at home, one with no multitrack capabilities, and wanted to record eight channels from it into a separate Audio Interface;

While you could definitely do that, you would need eight cables going from the Mixer to the Interface, which is just a hassle and something I would’t recommend.

So, getting a mixer with a built in Audio Interface, though more expensive, might be a great investment if you know how many inputs you need.

Mixer Examples

Take the Mackie ProFX8v2 8-Channel Effects Mixer with USB, for example;

This one is a pretty simple yet affordable mixer that you can use for live shows.

It comes with a built in USB interface but it can only record the Stereo Mix to your PC, meaning that while it can record, it’s best suited for live performances.

On the other hand, the Soundcraft Signature 12 MTK, while a bit pricier, can record up to 12 different tracks simultaneously to your PC while also serving as a regular Mixer for live performances, should you need it to.

Or Maybe 12 channels is too much for you? Or the price is too high? Then another good alternative is the Allen & Heath ZEDi-10; a mixer with a 4-in/4-out interface at a fraction of the price.

Both of these mixers that I just mentioned are part of another post I wrote about the best home studio mixers currently available, and I definitely recommend you check it out!

How can you tell if a Mixer can record Multi-tracks?

First, I’d highly recommend that you read the post I linked earlier about mixers that can record multi-tracks.

However, in the description of the mixer you need to look for the following things;

Some mixers are already labeled as being able to handle multitracks, like the Soundcraft Signature MTK 12, and this is a really easy way to tell.

But in most cases, you are going to need to look at the “USB Connectivity” or “Audio Interface” description of the mixer;

If it says 14-in/2-out, then this means that it will take those 14 inputs but only record them to a stereo file.

If it says 14-in/12-out, or 14-in/14-out, then it means that it is able to record those inputs to separately.

Just as a reference, mixers under $300 usually are not capable of multitrack recording.

Do I need a Mixer for Home Recording?

I think I made it clear that you don’t NEED a mixer for a home studio, but there are several benefits to having one, especially if it’s got a built-in audio interface that lets you record multitracks.

First of all, you will be able to record a lot more tracks simultaneously to your DAW, and this can really come in handy when recording your band, having a lot of guests on your Podcast, etc.

Additionally, some modern mixers allow you to record multitracks directly to an SD card, which is something no Audio Interface can do.

Mixers also let you set up different headphone mixes for every musician as well, which just makes the recording experience better, and you can add effects directly from the mixer without introducing any latency.

One feature that I think is extremely important to mention is that most digital mixers feature a DAW control mode;

This means that you can use the mixer itself to control the mix inside of your DAW, giving you a more “hands-on” approach to mixing since you’re moving faders and knobs instead of clicking.

However, mixers with multitrack recording capabilities, DAW control, and other high-end features, are definitely not affordable.

This is why I believe that for most beginners a simple audio interface is the way to go.

Other Advantages of a Mixer

One huge advantage of a mixer over an Audio Interface is that it’s better for streaming audio, and the reason for this is that with an audio interface you would need to rely on software to mix the audio before streaming it.

As we all know, software can crash and if you are streaming a podcast to a live audience, I would definitely avoid relying on it.

With a mixer you can simply mix the audio right there on the board and THEN send it to the computer to be streamed.

This is a much better -and safer- way of doing things.

Pros of a Mixer

  • More Control
  • Can add effects
  • Can be used for live performances.
  • Some can be used to control the DAW.
  • Monitoring without latency.

Cons of a Mixer

  • Big and Heavy
  • Not as simple to use as an Audio Interface.
  • More Expensive

I assume that whoever is reading this is probably a beginner when it comes to recording gear, which means that in most cases, you are going to be needing an Audio Interface and not a Mixer.

I wrote an Article about two Audio Interfaces that I consider to be excellent for beginners because of how little they cost, their overall sound quality, and the number of ins/outs they provide.

Now, here’s a very reasonable question that I used to ask myself when I was just starting out…

Why not connect directly to the 3.5mm microphone jack on the Sound Card?

The on-board sound card on a PC is also an Audio Interface that does the exact same thing as any other audio interface does, so why not just use that one and connect to the 3.5mm microphone jack?

Well you can do that but you can only record one track at a time.

The sound Quality will definitely suffer and there may be Latency Issues, and so on.

If you are just starting out and want to know if this recording thing might be fun for you, sure start that way, but as soon as possible upgrade to a better option!

Read more about the differences between an Audio Interface and a regular sound card here.

Which one is right for you?

If you are planning on simply recording some music at home and don’t need an extreme number of inputs, then an Audio Interface will suit your needs best.

On the other hand, if you want to be able to mix music for live shows while also having the option to record a high number of inputs, or if you plan on having guests over for a podcast, then a mixer is a much better alternative.

Conclusion

Choosing the right equipment isn’t easy, especially considering that there are simply too many options to choose from.

Why choose an Audio Interface over a USB Mixer that can do multi-track recordings?

Well, the first and most important reason is price; Mixers that can record multi-tracks are expensive, very expensive, in fact.

I would only recommend you get one of those mixers if you are absolutely certain that you will be taking advantage of it’s funcitonality.

For anyone who is starting out, or who likes to record on their own in their home studio, a simple Audio Interface with 2 or 4 inputs should be enough.

If, however, you need to record a podcast, mix music at live events, etc. definitely get a mixer.

I hope this information was helpful!

Have a wonderful day!

Frequently Asked Questions

Is a mixer the same as an audio interface?

An audio mixer takes multiple audio signals, combines them together, and creates one or more output signals.
An Audio Interface, on the other hand, works as a translator between your Inputs (microphone, guitar, etc.) and transforms that analog signal into a digital one so that your PC can “understand it”.

Do you really need an audio interface?

Even though your PC, Smart Phone and Tablet also have built-in audio interfaces, these are not up to par with the external ones you can buy.
They all do the same thing which is Analog to Digital conversion, however the quality of the sound you can achieve with an external interface will be much better, and the output signal will also be of a much greater quality.

Can you use a USB mixer as an audio interface?

If the mixer has a built-in Audio Interface then absolutely.
Now, some mixers can’t do multitrack recording which means that they will mix all of the tracks onto a single stereo file, which will then be recorded onto your DAW.

Difference between Sound Card and Audio Interface

Both work the same way, converting an analog signal to digital, and vice versa.
However, sound cards have minimal inputs and outputs and the sound quality is significantly inferior to the one of a dedicated audio interface.

18 thoughts on “Difference between an Audio Interface and a Mixer!”

  1. Hi Facundo

    I really need to know if purchasing the following would be enough to hook up two microphones, a guitar and a keyboard for live performances via Zoom.

    XENYX Q1002 USB

    I would truly appreciate your help on this as I have no clue as to how should go about it. So far, I have been told to purchase a sound mixer with 4 Channels😩. Please help!

    Thanks a million
    Anna

  2. Hello Dear,

    Would appreciate if someone has a fix for the below situation. I am new with recording, so kindly excuse if this issue was answered before.
    I have connected Mike on 1 channel and phone on 2nd channel (to play karaoke) of my mixer.
    I have Audacity for recording on to my computer.
    During 1st take i had listened to the karaoke from my main speakers… i thought it would be best to switch off main speakers and instead use headphones and listen to karaoke from headphones. I was using the headphone (earbud type) and jack to connect to MG series mixer.
    i was able to hear the Karaoke O/p on 1 ear and started singing and recording …once i replayed the recording through the quality was better than the 1st instance, noticed that vocal and karaoke were out of synch.
    Is there something i can do differently so that i can sing along with Karaoke and expect the recorded O/p to be in synch so that i dont need to do any adjustments and can get the O/p as a single stereo track.

    Kind Regards
    Sree

  3. Hi, I have a question about this.

    I’m a drummer and I record my drums occasionally for a video or a demo (8 mic setup). At this time I use a Zoom R16, a seperate anlogue mixer and an XLR splitter. My signal flow goes from the mics directly into the splitter. And then I have a set of XLR’s going into the Zoom R16 that functions as an audio interface. And also from the splitter the other 8 XLR’s go into the analogue mixer. Also I have my Iphone plugged in to the mixer (for metronome for example). So the analogue mixer is essentially my monitor.

    The output signal of the Zoom R16 is also connected to the mixer so I can hear the click or music in my DAW. (All DAW monitoring off of course!)

    Now I want to upgrade this setup and be able to connect a live mixer (for example Behringer X32) and use this for making a monitor mix for myself but also use it as an audio interface connected to my laptop simultaneously. Is that possible? Or does it function as a mixer OR audio interface? Like my ZoomR16.

    Also, if this is possible; Can I add effects to my monitor mix. But still record a ‘clean’ unprocessed signal for each microphone into my DAW at the same time?

    I hope my questions are clear! Very curious about the awnsers! Thank you!

  4. Anthony O'Connell

    Hi, this was a great article, thanks. I’m just starting out using an audio interface (Focusrite Scarlet 8i18, 2nd Gen) so that I can record acoustic drums (snare, overheads, and bass – 4 XLR input channels). I’m going to get to grips with Cubase elements (basic version) Is there a way that I can listen to a clicktrack or perhaps a youtube video from my phone while recording so that I have something to play along to, but without the music/clicktrack being recorded?
    Thanks, Tony

    1. Hey Anthony, I don’t think so, I have never tried that at least so I couldn’t tell you.
      I think the best solution would be to get a pair of closed back headphones and connect them to the interface.
      Best of luck.

  5. Nice article! I am trying to decide between a simple interface, like a Focusrite Scarlett 2i2 (or even Solo) vs an Alesis Multimix 4 which is a small mixer (essentially 2 inputs, with 2 more line level inputs for a stereo keyboard, I think), but it also has USB connectivity. It sounds like this will allow me to do everything the small interface will do and then some for a lower price and more flexibility. But the question is sound quality. I’m basically going to be using it to record instruments one at a time, but for certain instruments (like double bass or electric bass) I may use two mics or a mic plus going direct into a line/instrument level input, so I think it’s a matter of which will sound better. The question I have is, can the mixer provide similar (or better) sound quality than the above mentioned budget interfaces or will the interfaces have better pre-amps and thus give me better sound quality, even for going direct?

    1. Hey Man, how are you?
      I just checked and the multimix 4 only has a stereo out, meaning that everything you record will be recorded on-to a stereo file.
      Basically, it can’t do multi-track, and even if you only record two tracks it will be a lot harder to process them since it will be on a single stereo file.
      I’d highly recommend an audio interface, be it the Scarlett 2i2, UMC204HD, Audient iD14, or any other, because if you end up recording two tracks at once, like what you mention with using two different microphones, you will be able to process them individually.
      As far as the sound quality goes, I know the interfaces I just mentioned sound great!
      If budget is an issue, go with the UMC204HD, since it’s very affordable and sounds great!
      Hope this helps.

      1. Thanks for your response! I just want to clarify that with the Alesis Multimix unit, I can’t accomplish the same thing by using two different mics and panning one to the left and one to the right. resulting in each mic on each stereo channel? It seems like you are saying that the output of the Alesis (on any DAW) will result in one single stereo channel which will be different than two separate channels if I plugged the same two mics into an audio interface. I believe you are saying the latter will be easier to process than the single stereo file as they are more independent? I just need to understand that because I’m such a newbie to all of this. Also, what are your thoughts on the PreSonus interfaces (Audiobox in particular)? Could they be considered a step above Behringer if I’m on a budget? They also come with the Studio One DAW, which I hear is good. Thanks!

        1. Yup, since it’s a stereo track you will process the whole track at the same time, both the right and left channel.
          I haven’t tried the AudioBox, but most Audio Interfaces in that price range work just fine!
          But I’d recommend going for an Audio Interface instead of one of those tiny mixers, unless you want to spend a bit more and get the Allen & Heath ZEDi 10, which can do multitrack recording of up to four channels.
          Hope this helps!

  6. Hello,
    Thanks for the detailed info. I was wondering if I could use my Yamaha MG124cx mixer (no USB) to record live piano (2 condenser microphones) with garage band onto MAC so we could have a better sound recording for youtube purposes than just the regular iphone video.
    I am using a the headphone 3.5 mm input on the computer right now with the REC OUT on the mixer (red/white cable). From the readings I gather this is not optimal quality as it will not be digital. So I’d need a USB cable adapter perhaps?
    My main question is though, is my mixer OK (without the USB) or, in other words does it already have the audio interface, or should I just purchase a USB audio interface and go that route.
    I have not looked up yet what kind of soundcard my computer has, but i’s a MAC and I hope it’s good enough.Thanks in advance, beginner here!

  7. Just stumbled onto this post.
    I have a Scarlett 2i2 and an Allen and Heath Zed 10FX mixer.
    I have been using the 2i2 to play electric and acoustic guitar not just for recording but just as an amp too.
    Here’s my take.
    For quick and ez set up, the 2i2 works great however, it is limited as to how loud I can turn up to simulate a live setting. The two channels allow me to play guitar and sing through a mic.
    The Zed 10 FX is a little harder to set up to do what I wanted to do, actually had to contact A&H for help on that and by the way they were great, but after some assistance I got it sorted.
    Both were tied into my 2012 iMac and a pr. of JBL 6” monitors.
    With the A&H, I can really fine tune the eq and can crank out much more volume without issue when plugged straight into the mixer without any software.
    I don’t know if this is true or not, but the A&H tech told me that the preamps in the A&H are much better than what’s in the 2i2. He could have been stretching the truth, but who knows.
    I also believe that the A&H handled amp sim hiss much better than the 2i2 in Garagebands amp collection and Positive Grids Bias FX and both we’re recognized by my Mac and record great whether through Garageband or Reaper.
    The other thing that I noticed and was a big thing to me was that I had to unplug and plug back the usb cable often for the 2i2 in order to wake up sound, but the A&H was always ready regardless if it was on or off or if my Mac was asleep or not.
    So your experiences may be different than what I obtained.
    Bottom line is that they both work great.
    Peace.

  8. me with this subject but they simply dont reply me.
    im searching for a mixer that is ca 1meter wide because majority of the mixers today are built very compact and how silly it might sound, i have big fingers and always tuch other knobs by accident.
    i use the mixer more as musical instrument like the dub producers back in the days did and i have a 32 channel midas board but, now im really searching for a 24-32 channel mixer with built in audio interface via usb.
    would be very thankful if you could give me couple of models to look at.
    thanks! 🙂

  9. I have a question. If I wanted to turn my PC that has very high end specs into an awesome Karaoke machine but occasionally I may want to record my family singing as well, is the mix board or the audio interface the right way to go for me? In other words, most of the time this will just be used for fun to sing along with a YouTube video or maybe me playing piano etc., but occasionally if we find a song we really like we may want to do a recording of it. I’m unclear as to the best way to go for this.

    1. Hey Matt, this would depend on how many simultaneous tracks you need to record.
      With an affordable mixer you could record your family onto one stereo track, but that’s it… Even if you recorded them with 5 separate mics, these would all be collapsed onto a single stereo file.
      On the other hand, Audio interfaces are designed to record each track separately onto the DAW, meaning that if you have multiple inputs and microphones you could record a separate track for each family member, which just means that you would have more control over each track.
      I personally think that a regular and affordable mixer is your best option here. No need to get anything too fancy.

    1. I bought a Focusbrite Scarlett solo 3 gen im order to lessen the clicks and pops in FL recording. I dont use mikes..only mifi kybd and vsts. So article says its only for connecting stuff to the computer?

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