Headphone Correction / Room Modeling for Guitar

Jarick

Rock Star
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5,364
Breaking this out into a separate thread.

I've struggled with monitoring guitar at home...I really prefer to play with headphones but it doesn't sound the best. It's often too dry and harsh sounding and really exaggerates any weirdness in the frequency response, especially with distorted guitar. It can be fun with a lot of effects but not very natural sounding. I really like the sound of an actual speaker in the place we don't talk about because it's focused but diffused, if that makes sense. But then you miss out on cool stereo effects. And studio monitors to me have always been a struggle, it's too bright or not enough body and then you have weird room response, etc.

So I was looking at maybe trying different speakers again, or getting another speaker cab, or something else...but I realized I always go back to headphones and I already have really great ones like Sennheiser HD 490's and 600's. I've tried Sonarworks EQ correction but that's really hit or miss and doesn't really make playing guitar more enjoyable.

Then I came across the IK ARC On Ear which is a headphone DAC/amp with EQ correction, headphone/speaker modeling, and virtual speaker simulation. The last part really intrigues me. The idea is probably similar to cross-feed features that are on some high end headphone amps, which feeds a bit of the left and right signal into each other with some type of short delay. There's a long description here.

Anyways, for $250 I figured I'd roll the dice, and that will be here tomorrow. But I couldn't leave well enough alone, and came across this Realphones plugin by a company called dSonic? It also does headphone correction with speaker and room modeling. The latter again does something with the stereo image that I think is similar to the cross-feed functionality?

They offer a 40 day free trial so I grabbed that and have been playing with it all day. I have to say it's a lot of fun! The headphone correction isn't as extreme or unnatural as Sonarworks, but I tend to keep it at or under 50% correction. However the speaker/room modeling is really interesting. Cranked way up it can sound a bit like a room reverb effect, but generally it's a really short ambience effect that changes up the EQ, smoothing out the high end, and creating a much more solid center image. It may be kind of like a binaural impulse response with some other stuff going on.

Regardless, while playing guitar it really made it sound a hell of a lot more like playing a virtual amp. It's much less like sound coming at you from the sides of your head and more like sound coming at you front in front of your head. Stereo effects are WILD, you would think they wound sound less intense as they are less wide, but they again sound more like something in front of your ears. Ambient effects like reverb are a bit more exaggerated but it all sounds a bit more natural. And generally the EQ is rolling off some harshness and some of the rumbly low end too. That makes it more forgiving.

It also works well for music and general audio like YouTube. You can dial in the amount of room simulation you want so can add in like 30-40% mix which gives you again what I'd call a pretty natural sounding effect like it's in front of you instead of in your ears. The plugin also has a system wide mode; on my Mac you can pick it as an audio output and then in the plugin you can have it run to your interface. So I can bypass it by going to the UAD Apollo or select the Realphones and it still plays through the Apollo but with the effect on. Of course that means it will go to monitors too...

EDIT: I forgot to mention latency! There's almost none with the plugin. I ran my Axe 3 into the Apollo, then opened up Logic, brought that in with input monitoring, then enabled the plugin. There's like 1ms of latency maybe. I can't really feel or hear the difference vs running direct.

I'll report back tomorrow once the ARC arrives and I can mess around with it, but I may have to buy the Realphones software regardless of what I do with the ARC. I think it's pretty reasonably too like $60?
 
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A different price bracket maybe but Slate VSX is probably my best none guitar purchase ever.
Realphones is also very good I just find VSX to be in a different class. I only use Realphones as another mix check tool now.
 
A different price bracket maybe but Slate VSX is probably my best none guitar purchase ever.
Realphones is also very good I just find VSX to be in a different class. I only use Realphones as another mix check tool now.

Can you use it with guitar? Do you have to monitor through a DAW?
 
Zz05NDNjN2MyY2U3ZDQxMWYwYWZkMWVhNTViNWQyZmI4Ng==


Since you have some Sennheiser headphones, you can also try the Dear Reality MIX plugin.

You can get the whole suite of plugins for free from https://www.sennheiser.com/en-us/immersive/dear-reality by signing up for the Sennheiser newsletter.

I've been using the Dear Reality MIX for headphone correction and room sim for a while and have liked the results, but it's not necessarily the best for analytic listening. I'm very curious how you think it compares to the IK ARC On-Ear.
 
Gave a quick try of Dear Reality MIX vs Dsoniq Realphones. I used SoundSource to load the plugins on MacOS for use with any audio, then just watched some YT guitar stuff. I used my Sennheiser HD 490 Pro headphones.

MIX seems to be a lot less demanding and more responsive as plugin, Realphones will slow down and stutter when adjusted but works when it stabilizes.

For pure headphone correction they seem to be about the same, but slightly different sounding.

The room options on both will differ, with Realphones offering more intuitive tweaks.
 
Zz05NDNjN2MyY2U3ZDQxMWYwYWZkMWVhNTViNWQyZmI4Ng==


Since you have some Sennheiser headphones, you can also try the Dear Reality MIX plugin.

You can get the whole suite of plugins for free from https://www.sennheiser.com/en-us/immersive/dear-reality by signing up for the Sennheiser newsletter.

I've been using the Dear Reality MIX for headphone correction and room sim for a while and have liked the results, but it's not necessarily the best for analytic listening. I'm very curious how you think it compares to the IK ARC On-Ear.

Downloading now! I got a license for that with my 490's but I think it's free now.

Also downloading Can Opener which is a pure cross feed plugin. May as well try them all...
 
Super quick impressions of Can Opener - excellent! It does the cross feed thing without any headphone EQ correction or virtual room simulation, so it sounds cleaner with less impact on EQ or noticeable reverb/ambience. But it immediately locks in the center image. I notice the bass tends to drop a bit and the treble sounds more prominent, not sure exactly why. With guitar it's very noticeable using some stereo effects, it seems to center the bass more than the treble as you'd expect.

Combining Can Opener with Sonarworks works well, but you can also get really close with the Realphones if you go to advanced settings and start turning things off or down. None of the easy mode presets do this but you can essentially just run the cross feed and EQ by themselves.

Downloaded the Sennheiser one and installed, there's too much latency for playing.

I'm really annoyed I hadn't tried any of these before today. They can make a pretty big difference.
 
Alright I have a couple hours with the ARC and it's a bit underwhelming.

Installing the software was no issues, which was a pleasant experience from an IK product. I will say the new product manager software worked extremely well on my new Mac with zero issues for all the stuff I installed (Tonex, ARC X, now this). Nothing different here, just register the serial and you download the software. No drivers either, Mac found the audio interface and can select it right away.

There's a bunch of headphones on here including literally every headphone I have. I mostly use the Sennheiser HD 490 Pro or HD 600, but they have all kinds of Beyers and Sennys and Audio Technics and all that stuff. Even the more obscure ones like the Rode NTH-100, Meze 99, and Creative Aurvana!

The correction does sound more natural than the Sonarworks, but you can't adjust the amount of correction. For some headphones it was an improvement but for others it really overshot the correction. Like the DT-880 has way too much bass and way too little treble with the correction on. HD 490 Pro went from mid scooped to mid boosted. You can EQ a few bands but it's then EQ on top of EQ which is annoying.

Studio simulation to me doesn't sound as good as Can Opener or Realphones. There's a noticeable EQ change where it cuts the lows and pushes the treble and makes it sound thin. It also seems to overly collapse the mix to mono, where the other things I tried were more creating a stable center image and reducing the extreme panning, this is more like pushing everything right near the middle. Also the width description is strange, 100% width sounds very narrow while something close to standard width is called 200%. And the ambience setting to me doesn't really sound like it does anything, plus it's an on off toggle rather than a mixer like you'd want.

Virtual speakers sound kind of gimmicky to me, just like they were on ARC. Not going to use them.

Latency at first was really disappointing because it felt like about 10 ms. Playing guitar through it was just a bummer. But after way too much time I realized I had the phase align switch on which tries to do something to the low end frequencies. Shutting that off there's maybe 1-2 ms, almost imperceptible. So keep that off and you can absolutely play guitar through it. The aux input is a 3.5mm stereo jack though, so you'll need some kind of adapter out of a modeler. Luckily I've got about 500 cables and somehow had one that works.

In terms of being a pure headphone amp, it's fine. To me it seems to dull the tone the slightest bit, where my Apollo adds just a hint of brightness. It's plenty loud for me although depending on the headphone you may need to disable the safe headroom setting. On my HD 490 it reduces the output by 4 dB to compensate for the correction EQ boosts, but on my DT-880 it reduces by 11 dB which is way quieter. I think disabling this also makes the overall sound a bit brighter. But there's enough power for me on the unit, about on par with the Apollo or maybe just a tick less.

Another feature I miss from Realphones is the output limiter which is clever. That seems like a no brainer to include. Keep the output from overdriving and prevent noise spikes.

Lastly the build, it's fine. The puck is a nice feeling metal box and the jacks are all solid and there's even a metal power toggle switch which is nice. However the volume knob had fallen off in shipping and while it's easy to pop back on, that's a little concerning. And speaking of the volume knob, it's an analog controller for digital volume, so you may nudge the knob and notice no difference in the volume, or you may nudge it and hear a noticeable jump to the next level. I really wish this was much more granular.

So if IK is listening, please update the firmware with the following:
  • Mix knob on the calibration EQ
  • Check the studio simulation - is there too much EQ difference?
  • Mix knob on the ambience
  • Add an output limiter
  • Increase the digital volume adjustment granularity
I'll keep messing with it tomorrow as my brain is shot now...
 
The correction does sound more natural than the Sonarworks, but you can't adjust the amount of correction. For some headphones it was an improvement but for others it really overshot the correction. Like the DT-880 has way too much bass and way too little treble with the correction on. HD 490 Pro went from mid scooped to mid boosted. You can EQ a few bands but it's then EQ on top of EQ which is annoying.
Are you using the HD 490 Pro "Mixing" or "Producing" pads? For those who don't know, the headphones come with switchable earpads that do alter how they sound. I use the velour "Producing" pads because they are much more comfortable.

Latency at first was really disappointing because it felt like about 10 ms. Playing guitar through it was just a bummer. But after way too much time I realized I had the phase align switch on which tries to do something to the low end frequencies. Shutting that off there's maybe 1-2 ms, almost imperceptible.
I wonder if this is just minimum vs linear phase alignment? Linear phase option on Sonarworks or Dear Reality MIX has markedly more latency.

Try the minimum phase option Dear Reality MIX too, it's buried under the headphone compensation menu. I find that this reduces the latency to unnoticeable levels. For some reason some of the space options are much more demanding. e.g "Mix Room A" works fine at 32 buffer size on my EVO8, but "Mix Room B" requires buffere size 64 or it becomes a mess.

On my HD 490 it reduces the output by 4 dB to compensate for the correction EQ boosts, but on my DT-880 it reduces by 11 dB which is way quieter.
I remember the DT-990 Pro correction on Sonarworks caused the output level to drop a ton because those headphones need so extreme correction in some frequency ranges. This is usually designed so that you avoid clipping due to boosts. So I'm guessing this is normal.

IMO for playing with hardware modelers it's just generally easier to get headphones that sound good out of the box. I don't feel I need any correction with my Sennheiser HD 490 Pro or HD 6XX with any modeler as they are already close to right out of the box.
 
Yeah I would say the HD 600 has very little correction noticeable, there’s a boost in the bass and a bit more clarity after but it’s pretty flat to start with. Wish it was as comfortable as the 490!

It’s definitely easier to dial in tones with the correction and spatial sim enabled. It takes some of the spikey high end out of the equation, generally makes different impulses sound less drastic in EQ shifts.

Still not sure it’s better than one of the plugins though which is cheaper. Although then you have to mess with enabling and disabling compared to actual monitor outputs.
 
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