What are the converters in the AM-4?

Will Chen said:
Noted above.


However, I'm not sure IRs/Dynacabs actually impart any latency.
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If you can move the IR or the Dynacab to the right, then it is imparting latency. Now, whether you can hear it or feel it is another story.
I don't think I would notice it while playing a tone with the IR moved to the right by itself. If I A/B them, one at zero and another at say 0.30ms is where I notice it.
 
OK, ok...I just started blank and made a Fender preset with a bunch of amps and different drives...and it sounds pretty great. I guess I WAS basing it on trying to tweak some presets. Some good some not. But - yeah - I guess it just took me dialing it in the way I wanted (duh).
 
GuitarMan2550 said:
If you can move the IR or the Dynacab to the right, then it is imparting latency. Now, whether you can hear it or feel it is another story.
I don't think I would notice it while playing a tone with the IR moved to the right by itself. If I A/B them, one at zero and another at say 0.30ms is where I notice it.
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I actually don't believe so. FFT transforms don't really impart latency. I believe that graphic is just so one can visualize alignment and impact on the phase relationships/comb filtering.
 
Johnkenn said:
I STAND CORRECTED. I can get the Deluxe to sound pretty much as good as the TKIP with the same IR. Awesome. Never trying to slag the thing - I was genuinely asking.
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That is awesome ! & no worries on complaints every one has there own taste ! I owned a TKIP also & your right it is an awesome sounding box I just sold it because as found out the AM4 can get there & for my use much more versatile.
 
Johnkenn said:
I’ve had several AxeIII’s in the past - and my experience was…better with those.
I assume they’re not the same as those in the III?
Im not trying to lob a bomb - I just got it and haven’t had more than an hour with it…maybe I just need to dial stuff in.

I’m listening through a Hilo with Amphions and a sub. Room is professionally treated with a Trinnov st-2. So, I’m confident I’m hearing things correctly.
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The converters aren't the identical converters used in the Axe-Fx III but they're from the same family. The Axe-Fx III uses 8-channel converters while the AM4 is only two channels. They specs are pretty much the same.

The analog components in the AM4 are also very high quality. It uses premium Burr-Brown and Analog Devices op-amps. No crappy CMOS stuff, it's all either Bi-FET or Bipolar. Film caps in critical locations.
 
GuitarMan2550 said:
I guess I should have stated that when I A/B them, I did use IRs. I have never really used the Dyna-Cabs but after getting the AM4 I have a little.
I Noticed something odd? This does the same thing on both the Axe FX and the AM4.
Here are a screen shot of the align window on each, Dyna-Cab and IR.
Notice anything odd here?
View attachment 165222View attachment 165223
Notice how on the IR the peak starts at the beginning and on the Dyna-Cab it is delayed in the timeline?
Anyone know why that is this way?
While using an IR, if I moved it further on the timeline like the Dyna-Cab is here, it would sound a bit off, like less bass and a bit more latency feel to it.
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Dyna-Cabs are NOT minimum-phase so there will be a short leading silence. It is less than half a millisecond.
 
FractalAudio said:
Dyna-Cabs are NOT minimum-phase so there will be a short leading silence. It is less than half a millisecond.
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Well according to TGP that's way too long and I can easily hear that huge gap.

Also I can also throw a football over them mountains.

And yes I stand at least like 8 feet from my cab, 2 feet from a monitor, and about 15 feet from the PA speaker when I play, why do you ask?
 
GreatGreen said:
Well according to TGP that's way too long and I can easily hear that huge gap.

Also I can also throw a football over them mountains.

And yes I stand at least like 8 feet from my cab, 2 feet from a monitor, and about 15 feet from the PA speaker when I play, why do you ask?
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No one is hearing a half millisecond not even Vai likely he was complaining about 3 -4 MS if I recall
 
Randalljax said:
No one is hearing a half millisecond not even Vai likely he was complaining about 3 -4 MS if I recall
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Yep, I doubt you could hear or even feel 5 ms, really. In just about every hearing test I've done, even ones where you can play both the randomized control and delayed samples over and over at will, 10 ms is about as tight as I can hear sometimes but not reliably, and again that's under perfect lab conditions. And it wasn't even because the delayed sample sounded obviously delayed, it just sounded slightly different than the control. Nobody is reliably hearing or feeling the difference between a handful of ms.
 
FractalAudio said:
The converters aren't the identical converters used in the Axe-Fx III but they're from the same family. The Axe-Fx III uses 8-channel converters while the AM4 is only two channels. They specs are pretty much the same.

The analog components in the AM4 are also very high quality. It uses premium Burr-Brown and Analog Devices op-amps. No crappy CMOS stuff, it's all either Bi-FET or Bipolar. Film caps in critical locations.
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Yeah. No flies on the Burr Brown. Damn. That’s higher quality than I was expecting, honestly.
 
Sounds like the original concern may be moot, but one test is they is to use the digital outs on each device to do a comparison, to eliminate the converters from the equation.
 
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