GT-1000 with 3rd party IR sounds diferent than IR loader

[afonsom98]

Stick to the X Amps, the Boss Original Amps and the AIRD Boss Cabs ..... at all costs avoid the legacy Amps and forget getting 3rd Party IR's to play/sound "right" .... add this all to the Form Factor and the GT1K is a kick-ass unit.

Here in end'eth the lesson

im not a fan of the x amps feel. sounds good, but the feel is weird to me. But this is me, someone who had the tonex pedal before

 

[ian_dissonance]

im not a fan of the x amps feel. sounds good, but the feel is weird to me. But this is me, someone who had the tonex pedal before

I found with the X-amps you just kinda have to forget anything about guitar amps and dial it in by ear. On no normal amp would I be running the gain at 9/10, but it works. Too squishy? Turn the SAG all the way off. The high gain ones are very sensitive in the EQ, as well, plus or minus 10 from stock is usually more than I need (except the X-Ultra, the bass on that one is awesome ridiculous for me unless I put it at ~25 or do a huge cut before the amp).

 

[ivanmancic]

I used to own a GT1000 Core, and ironically, Katana: Go I got recently actually sounds better and is easier to get a really good tone out of.
While I had the GT, I would always use internal cabs, as I thought IR's sounded off. This pretty much confirms it.

 

[ian_dissonance]

Fun update, got a GX-100 (ordered pre-$160 price increase) and IRs sound pretty normal in there. And they load much faster. But on the downside there seems to be some limit somewhere in there and I could get digital-sounding clipping in the signal chain while the meters suggested I was well below hardware clipping. Boss gonna Boss I guess. Outside of that though this little pedal is sweet.

 

[afonsom98]

For me it's an incredible love/hate-relationship. It does some things no other modeler does right now - but it doesn't necessarily do them properly. The main reason for me to buy it (and keep it for at least a while to come) have been instant switching and global blocks. But the instant switching comes with (sometimes unforseeable) compromises and the global block functionality, while still being the main reason for me to keep it, is realized in a way that I can barely believe this was actually tested at all in terms of usability. There's a risk of accidentally overwriting a global patch setting as you can't see which ones you use in the save dialog and when you copy a patch you would have to deactivate all global blocks (should you not want to use that patch in a "global group"), otherwise you might destroy your precious global settings for that block (there needed to be an option to "de-couple" all blocks from being global).
And let's not even start to talk about anything related to editing. Regardless of doing it on the unit or through whatever editor, compared to any decent other devices, it'a a most gruesome experience - just try to set up and control assignments on the device and you know what having a really bad day feels like (but you of all people obviously know that already).

So, i converted my IR to boss specs, like they told me in support. It does feel less compressed in a way. You should try it, see if it helps with that

 

[Sascha Franck]

So, i converted my IR to boss specs, like they told me in support. It does feel less compressed in a way. You should try it, see if it helps with that

Defenitely not. Most of the IRs I use are in 44.1 as well.

 

[afonsom98]

Defenitely not. Most of the IRs I use are in 44.1 as well.

the key thing for me was reducing to 20.5 ms (the 1024 samples part that boss said)

 

[Sascha Franck]

the key thing for me was reducing to 20.5 ms (the 1024 samples part that boss said)

I do that for all of my live IRs anyway (and these would be the only ones I wanted to use in the GT).

 

[Dadbodblues]

I did a comparison using the same IR both in the gt-1000 and with a IR loader (Nad IR). The amp was the same, the gt1000s Rectifier model. Somehow it sounds diferent, but why? Its literally the same IR file. The GT-1000 (with the IR internaly in the system) made the IR sound worse.

View attachment 47090

One thing I noticed is that the Transparent amp makes a massive spike around 8k, so much that I could always hear it when I played. I forget what other frequencies it affects, but 3rd party IRs do sound different. I haven't tried using 44.1k and shortening the IR lengths though, maybe that should help.

 

[afonsom98]

One thing I noticed is that the Transparent amp makes a massive spike around 8k, so much that I could always hear it when I played. I forget what other frequencies it affects, but 3rd party IRs do sound different. I haven't tried using 44.1k and shortening the IR lengths though, maybe that should help.

be sure to leave your findings here!

 

[afonsom98]

Just to put here: Thanks for clarifying, and for sharing your thoughts. You’re absolutely right: the GT‑1000CORE integrates IRs into the AIRD system, which adds dynamic amp–speaker interaction. This is part of what gives the unit its feel, but it does mean IRs won’t sound 100% identical to external loaders that play them raw.

At present, there isn’t a proprietary IR format for GT‑1000CORE, but here’s how to get the closest match and best performance:

1. Pre‑convert IRs to 44.1 kHz sample rate and 1024 samples before importing. This avoids extra resampling and keeps phase alignment consistent.
2. Choose MPT IRs if you want the tightest response and predictable phase in complex patches. RAW IRs are fine if you prefer the original mic/room feel and accept a touch more latency.
3. Level‑match carefully when comparing IR types. Even small differences can feel like a change in dynamics.
4. If you want completely raw IR playback, the only way is to use an external IR loader after the GT‑1000CORE, bypassing AIRD.

Your feedback about offering an optimised IR format is valuable. I’ll pass this on to our product team. We’re always looking at ways to improve flexibility for users who rely on third‑party IRs.

 

[ChordInversion]

Big GT1000 is best, imo. The Core should have been a hit but it was noisy and just did not play nice with other gear so consequently; the size of it was restricting.

I had both, and I kept the CORE (gave the big one to a friend). I haven't noticed any noise issue, but maybe that comes down to how I use it.

Others have said it. The GT-1000 is not really a competitor to other modelers. It's not going to get you a bunch of accurate sounds spanning the history of amps. It's not going to be a performance device that someone tours nationally. But I at least can dial in sounds that I like and can't get anywhere else.

 

[Sascha Franck]

It's not going to be a performance device that someone tours nationally.

Well, once you replace the amp modeling and are past the various editing nightmares, it's a most excellent unit for every level of playing. But unfortunately you have to get rid of the internal amp modeling, at least for me there's been no way around it.

 

[afonsom98]

So, I did what roland recommend above and I want to share my findings you all.

1. "Pre‑convert IRs to 44.1 kHz sample rate and 1024 samples before importing. This avoids extra resampling and keeps phase alignment consistent."

When I did this to my IRs, the loading was much faster than usual. HOWEVER, there was a loss of high end content compared to original IR size upload, even if the boss gt1000 converts to the measures mentioned by roland above. I used the same IR from York Audio, but uploaded one with the full original size and the same one, reduced to 1024 samples, 44.1 sample rate.

1. Choose MPT IRs if you want the tightest response and predictable phase in complex patches. RAW IRs are fine if you prefer the original mic/room feel and accept a touch more latency.

This is true, but its true in every unit.

1. Level‑match carefully when comparing IR types. Even small differences can feel like a change in dynamics.

Didnt notice a change, to be honest.

1. If you want completely raw IR playback, the only way is to use an external IR loader after the GT‑1000CORE, bypassing AIRD.

This is true, the sound quality is improved, HOWEVER, the amp dynamics change. My guess, is that the Boss GT-1000 applies some sort of multiband compressor? and eq? to simulate someting close to speaker drive? so the IR is not linear/static, like in a IR loader. Even thought someting like the helix as a better quality in sound, the dynamics of the boss gt-1000 (IN MY EXPERCIENCE comparing the two) have a better feel and responde to my playing.

 

[ian_dissonance]

So, I did what roland recommend above and I want to share my findings you all.

1. "Pre‑convert IRs to 44.1 kHz sample rate and 1024 samples before importing. This avoids extra resampling and keeps phase alignment consistent."

When I did this to my IRs, the loading was much faster than usual. HOWEVER, there was a loss of high end content compared to original IR size upload, even if the boss gt1000 converts to the measures mentioned by roland above. I used the same IR from York Audio, but uploaded one with the full original size and the same one, reduced to 1024 samples, 44.1 sample rate.

1. Choose MPT IRs if you want the tightest response and predictable phase in complex patches. RAW IRs are fine if you prefer the original mic/room feel and accept a touch more latency.

This is true, but its true in every unit.

1. Level‑match carefully when comparing IR types. Even small differences can feel like a change in dynamics.

Didnt notice a change, to be honest.

1. If you want completely raw IR playback, the only way is to use an external IR loader after the GT‑1000CORE, bypassing AIRD.

This is true, the sound quality is improved, HOWEVER, the amp dynamics change. My guess, is that the Boss GT-1000 applies some sort of multiband compressor? and eq? to simulate someting close to speaker drive? so the IR is not linear/static, like in a IR loader. Even thought someting like the helix as a better quality in sound, the dynamics of the boss gt-1000 (IN MY EXPERCIENCE comparing the two) have a better feel and responde to my playing.

I did the conversion but not the sample adjustment and I think they do sound a little more like what I expect. The volume difference is a PITA, though. I’m honestly happy with the “original” cab for most things anyways and haven’t even added any IRs to any presets I’m using live. 100% agree that the response of the GT-1000 is very fun to play.

 

[Boudoir Guitar]

Is the "speaker impedance curve" built into the Boss cab block? I feel like we went through this at some point.

 

[JiveTurkey]

Boss fuzted around with this nonsense so long that people will have fully gravitated back towards onboard cabs on everything (Dynacab and Helix cab block) by the time they "get it working"

 

[Boudoir Guitar]

Boss fuzted around with this nonsense so long that people will have fully gravitated back towards onboard cabs on everything (Dynacab and Helix cab block) by the time they "get it working"

"Bossmodeling division: we've never heard of any gear but our own, but have listened to lots of polished-production recordings of guitars. If you want to make your guitar sound close enough those recordings to work in a mix, you just might like our modeling products!"

 

[Sascha Franck]

Seriously, when reading all that stuff (which I've been through as much as it gets myself...), purchasing those Tonex Ones really looks like the best decision ever. Got my amp models sorted and the GT is a great unit to work as a brain and modifying them - no need to ever deal with their funky modeling and even funkier IR loading ideas ever again.

 

[JiveTurkey]

"Bossmodeling division: we've never heard of any gear but our own, but have listened to lots of polished-production recordings of guitars. If you want to make your guitar sound close enough those recordings to work in a mix, you just might like our modeling products!"

I'm going to be careful how I say this. The GT1000 was great for idealized guitar sounds. If you just want generic high gain sounds slathered in some mod and delay grease; it is killer for that. If you get on with their sounds.

My Stadium experience reminded me a LOT of that. Only with obviously an interface on top that is galaxies away as far as interactivity and usability and overall joy to use aspects If you want a killer clean, crunch and high gain with some GREAT grease on top; it's there out of the box. It's just when you start comparing the amp models to real life models in a lot of cases (or all in the Boss' case) where the differences pop up.