Audient iD4 vs Focusrite Scarlett 2i2 and 2i4 Comparison Review



For this review I’m going to be comparing the Audient iD4 against the Focusrite Scarlett 2i2 and 2i4.

All three are bus-powered USB audio interfaces that share a lot of similar features. The price is the same for the iD4 and 2i4, both sell for $199, and the 2i2 is $50 less.

Last month I posted a review of the 2nd gen 2i2 and a comparison between it and the 1st gen 2i4.

I first started out with the 1st gen Scarlett 2i4 but when Focusrite released the 2nd gen models with much lower overall latency I decided to get a 2nd gen 2i2.

The 2i4 runs flawlessly on my setup so I just assumed the 2nd gen models would be the same, but there are still some bugs with the Windows drivers for the 2nd gen models so I wanted to try the Audient iD4 to see if it was any better.

Unfortunately it has some imperfections as well, mainly not being able to run at the highest settings, so there is no clear winner in this comparison review. In fact it’s surprising just how similar the Audient iD4 and Focusrite Scarlett interfaces are overall.

Note: These are my personal results comparing the iD4 with the 2i2 and 2i4. Audio interfaces are a tricky thing, so take this comparison with a grain of salt. Overall results and general performance may differ greatly on other computers and with different software. You pretty much have to test audio interfaces with your own specific setup to know if they’re going to work well or not.

You can compare the specs between these audio interfaces on the Audient website and Focusrite website. I don’t know what most of that crap means so I won’t be referencing any of it here.

Also note that I’m comparing the 2i4 as an interface only, not as a 1st gen vs 2nd gen thing. The 1st gens will be phased out so this comparison applies to the 2nd gen interfaces in terms of performance, features, etc.

Audient iD4 vs Scarlett Video Comparison

Build Quality

Winner: Tie

Both brands offer solid build quality with metal casings and knobs. Both feel very sturdy and well made, so there’s no clear winner here.


Winner: Focusrite Scarletts

The Scarletts win this category because they both have 2 combo jacks whereas the iD4 has one combo jack and a dedicated D.I input, so the iD4 cannot record two mics at the same time, for instance. The 2i4 also adds MIDI in and out, RCA outputs, and a separate channel for headphones.

Overall Latency

Winner: Focusrite Scarletts

The 2nd gen Scarletts have the edge when it comes to overall latency. See this separate latency comparison review for a look at the numbers on Windows. The iD4 would be a lot closer if it worked at 64 samples but on my computer that setting crackles constantly even at 0% CPU usage.

D.I. Sound Quality

Winner: Tie

I recorded a couple different basic guitar parts using direct input on both interfaces and I was totally surprised to find that they sound completely identical on my speakers and headphones.

Playing both tracks at the same time while switching the solo button between them sounds like a single recording. It’s crazy how identical the D.I. recordings sound. I included some examples in the video review.

Mic Preamp Sound Quality

Winner: ?

First off, I don’t have the tools or the knowledge to properly compare two mic preamps. For the most part I don’t even work with vocals so I tried comparing a mic’d amp with both interfaces to see if there was a noticeable difference in sound. Then I realized how incredibly difficult it is to get the levels to match exactly so it’s pretty much a pointless endeavor.

The bottom line is there’s not enough of a difference between them for one to clearly sound “better” than the other. So you pick ’em. I’m going back to playing guitar; I don’t care about the minute differences between the damn mic preamps. 🙂


Winner: Depends

As far as headphones go, each has an advantage over the other so there is no clear winner.

The iD4 has the advantage of 2 headphones output jacks, one of each size.

The 2i2 and 2i4 have the advantage of independent volume dials for the headphones, and the 2i4 has the advantage of being able to set the headphones to a separate channel than the main speaker outs.

When it comes to sound quality, again, there’s not enough difference for me to definitively say that one sounds better than the other. Both sound good and both have enough headroom to make you permanently deaf.

Direct Monitor

Winner: Audient iD4/Scarlett 2i4

Both the iD4 and 2i4 have dedicated knobs to blend the direct monitor and playback signals to monitor without latency. The 2i2 just has a switch to turn direct monitor on and off at a 50/50 mix.

Output Sound Quality

Winner: Audient iD4

This is a real tricky one. I have no way to definitively compare them and it drives me crazy. At first I was convinced the iD4 sounded better but switching back and forth comparing them it’s so hard to tell the differences, and it’s not like I can listen to them at the same time.

But if I had to choose I’d say the iD4 sounds better. Something about the bass seems to have a bit more punch to it, whereas the Scarletts seem to sound a little more flat. The iD4 seems to have a more balanced sound, whereas the Scarletts have more focus in the upper mids. Or it could just as likely all be in my head. The hell if I know…

Performance with Windows

Winner: Audient iD4

I get occasional freeze-ups and blue screens because of bugs with the 2nd gen Scarlett drivers, but that hasn’t happened once with the iD4. I also have to frequently toggle the buffer size setting with the 2i2 to fix CPU spikes.

Sample Rates

Winner: Focusrite Scarletts

The 2nd gen Scarletts add support for higher sample rates, 176.4 kHz and 192 kHz. The iD4 tops out at 96 KHz.

iOS Compatible

Winner: Audient iD4

The Audient iD4 supports iOS 6 and later. The Scarletts don’t support iOS.

Included Software

Winner: Focusrite Scarletts

The Audient iD4 doesn’t come with any added software perks. The Focusrite Scarletts come with Ableton Live Lite 9, some Softube plugins, 12 pedal plugins for Pro Tools First, and some reverb, EQ, and compressor plugins.

Extra Features

Winner: Audient iD4

The iD4 has a couple of extra unique features that separate it from the Focusrite Scarletts. First, the iD4 has the option to pan the DI and mic inputs from left to right to get a balance of both in your headphones.

Secondly, the iD4 has a feature that lets you hit a button to switch the volume dial to a scroll wheel to use with plugins and anything else that works with a mouse scroll wheel (that’s what it gets mapped to).


Doing this comparison review still hasn’t helped me decide which one to keep. The lower latency of the 2nd gen 2i2 is a big advantage for tracking guitars and e-drums, but the issues with the Windows drivers is a major turn off (it just triggered another blue screen doing this comparison).

If the Audient iD4 would just run smoothly at 64 samples it would be an easy choice because then its latency is super low too. But with my setup 128 samples and 9.3 ms of latency is the best it can do, and even then there’s an issue with Ableton Live that causes crackling whenever the CPU is above 30%. With Pro Tools 12 it runs fine at that setting so it’s all rather confusing…

Update: After a few more days of testing, I’ve pretty much settled on using the 2nd gen 2i2 moving forward. The Windows drivers have some bugs but when it comes to actually using the interface for recording it works really well, no crackling, no drop-outs, it’s very reliable, even with high CPU usage. Being able to track guitars with only 5.1 ms of overall latency without a big CPU hit is the clincher.

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16 Responses to “Audient iD4 vs Focusrite Scarlett 2i2 and 2i4 Comparison Review”

  1. Great Review!

    I can confirm Latency performance of the ID4 with my System.

    I can imagine it would be of interest for you to see how the Steinberg UR22 performs in all of this.
    It has seperate Headphone/Speaker Volume control, 192khz, very stable Drivers, can’t say much about the latency though, but I will give it a try coming week.

    • I can confidently say my interface search is over for awhile. The 2nd gen 2i2 has been working great and the low latency makes everything better. Lot of people like the Steinberg interfaces too, but the latency isn’t as low. Someone else was saying 8ms was as low as it can go, which is good, but no where near the Scarletts.

  2. Hey man great review, firstly can you please respond by email and delete this comment?

    So I saw the 2i2 mk2 video on youtube and it looks perfect for my needs, I just have a few question. I have a behringer UMC202 which is essentially the same in every way.

    #1 My guitar DI’s sound very fizzy especially around the 4k range, not sure if its the pre amp or the pickup, either way if I replace both I assume this issue should relatively resolve?

    #2 The windows drivers for the behringer are horrible, setting to 256 samples (9.7ms) is just low enough for guitar monitoring with amp sims, any lower will cause glitches. But no matter what buffer I have it will constantly glitch out my whole system. When on the web or watching videos the sound will constantly cut out because of the interface, have you had any issues like this with the Focusrite? I was thinking of getting an RME Babyface pro but it is $1100 aud, so a $200 aud focusrite that fixes my problems would be perfect. Thanks!

    • Firstly, why would you want the comment deleted? There is no personal info or anything. Someone else may want to know the same thing. Second, there’s no way for me to answer questions like these. There are way too many variables. The only way to know how well it’s going to work on your system with your DAW is to try it. Personally I have no problems with the 2i2 playing different sample rates and music sources at the same time on my PC. The one exception is it doesn’t play well with Pro Tools on my PC but I can’t stand using PT anyway so no big loss.

      • Ah sorry mate I was just going to email you to ask but your website said to comment like that instead but all good. All I was wondering was if you have had any problems/glitches with the 2i2, audio cutting out, or any problems with the ASIO drivers, I use reaper so I think I should be ok. cheers

        • Yeah, the 2nd gen 2i2 has been pretty solid. I can push it hard at 64 samples with a bunch of amp sims at high cpu without getting audio problems. Sometimes I have to toggle the buffer size or sample rate, like when PT wigs out, but then it works fine after that.

  3. Hi, thanks for your information. I am asking which is better, if audient id4 or focusrite Scarlett 2i4. I road that Scarlett has less latency, but.. Audient iD4 has better quality? I don know aabout that.

    Could you help me? Thanks so much! I am a flamenco guitar and I would want it for home studio and record my proper music in my home.

    • For me the lower latency while being able to run smoothly at high CPU is a must for tracking DI guitars using amp sims, so the Focusrite Scarlett is the clear winner. Focusrite’s drivers are more developed than Audient’s, so they perform better at lower latency and higher CPU, but that’s a Windows thing so you might experience entirely different results with a Mac.

  4. Sorry, I am Daniel again. I think is better if you know about my laptop. Is a Macbook Pro MacOs Sierra 10.12.1. I am very lose… Thanks again!

  5. Hiya!

    Like legions of others, I’ve been fretting (pun intended) over my choice of audio interface.

    I want it for mic recording of vocals, live piano and acoustic guitar and also direct inputing regular humbucker (Epiphone LP) and single coil electric guitars. I’ve pretty much settled on the 2nd gen Focusrite Scarlets, because of their reported low latency. I have a 2015 27in iMac, so presumably no driver or computing power issues. I’ll be using GarageBand (& maybe one day, Logic), and using the built in Drummer and other virtual instruments.

    Thus it comes down to either a 2i2 or a 2i4.

    Anyway, MIDI I can do via USB, so I don’t care about that. That basically leaves the headphone mix. With the new lower latency, presumably this means less need for the direct monitoring setting, especially in the above outlined scenarios?

    Would this be a fair comment?

    If so, perhaps the 2i2’s simple switch would suffice? Or are there real advantages to being able to blend the signals as in the 2i4?



    • Yeah, direct monitoring is pretty much pointless now. I never use it. The latency is unnoticeable on the 2nd gen Scarletts now that they’ve got it low enough.

  6. Cool.

    So, really, since I don’t need to be able to cue mix (like a DJ might), and the latency is this good now, and the DI headroom has improved making it fine for guitars, there’s no real advantage in the 2i4 over the 2i2 in my situation?

    Would that be a fair call, do you think?



    • Yeah, it was the same thing for me. That’s why I went from the 1st gen 2i4 to the 2nd gen 2i2. It wasn’t worth paying $50 more for features I didn’t need.

  7. Hiya!

    You’ve been really helpful, thanks heaps.

    I have one more totally ‘newb’ question though. I don’t have ‘studio’ monitors, but will be using my AudioEngine N22 amp and passive speakers for mixing (along with switching between that and using headphones on the 2i2).

    The AudioEngine amp has left and right RCA inputs (& a 3.5 TRS input).

    Will I need two ÂĽ inch (6.35mm) mono TS to RCA cables, or something else?

    Again, thanks for your effort on this.

  8. Hi !
    @ Dean : assuming you’ll be using the Scarlett (6,35 outpouts) with a stereo input (RCA), you might need that cable :