Axe-Fx III Firmware 22.00 Release

[Bruce Sokolovic]

I wonder if things will eventually get to a point where there is a dynacab for each impedance curve response (minus the load boxes).

I’m going to guess these will be released together as a package. Who knows though.

 

[mr_fender]

How does one become a beta tester? Sworn allegiance? Fractal face tattoos? Make-a-Wish Foundation?

(no, but seriously, I've beta tested music software before)

Blood in... Blood out...

 

[mr_fender]

I wonder if things will eventually get to a point where there is a dynacab for each impedance curve response (minus the load boxes).

That's a good point. I wonder if the impedance curve is possibly stored with the dynacab data or if it would have to be added via a firmware update. Would be really awesome for it to just load up with the new cabs.

 

[jimmynorrisjr]

If they come out with cab packs, I wonder if you will be able to replace cabs you don't plan on using with ones you do. My credit card is waiting to be swiped, regardless of how it pans out. I know it will be good.

 

[ledhalen45]

If it worked this way and if it came down to it, I would happily and willingly sacrifice storage space that would be used for legacy impulse responses in exchange for the ability to store a larger amount of dyna-cabs.

 

[Joe Bfstplk]

If it worked this way and if it came down to it, I would happily and willingly sacrifice storage space that would be used for impulse responses in exchange for the ability to store a larger amount of dyna-cabs.

+1

 

[Rock Chalk]

If it worked this way and if it came down to it, I would happily and willingly sacrifice storage space that would be used for impulse responses in exchange for the ability to store a larger amount of dyna-cabs.

Absolutely……out with the old, in with the new….

 

[jimmynorrisjr]

If it worked this way and if it came down to it, I would happily and willingly sacrifice storage space that would be used for impulse responses in exchange for the ability to store a larger amount of dyna-cabs.

Absolutely. There are only a few old IRs I plan on still using. Not everyone is likely to have the same plan as me, I do understand.

 

[sprint]

I wonder if things will eventually get to a point where there is a dynacab for each impedance curve response (minus the load boxes).

somewhat the opposite - if the impedeance speaker page curves are an attribute of cab + amp, then the curve data is needed for every amp / dynacab combination. That's what we got in fw 22 but I don't know where the data is being stored - probably with dynacab info, or maybe calculated somehow, or both.

Edit: See discussion below which I think is important wrt to "speaker page curve" (as shown in the amp block speaker page), and "speaker impedance curve" as in the SIC related to a cab.

 

[unix-guy]

somewhat the opposite - if impedeance curves are an attribute of cab + amp, then IC curve data is needed for every amp / dynacab combination. That's what we got in fw 22 but I don't know where the data is being stored - probably with dynacab info, or maybe calculated somehow, or both.

I don't think so. There's not an Impedance Curve for every amp today... Only for the cab. It's used by the amp...

 

[sprint]

I don't think so. There's not an Impedance Curve for every amp today... Only for the cab. It's used by the amp...

Selecting different amps while leaving the Dynacab selection unchanged yields different curves for me in both AE and FP. Example: Start with Dynacab-Slot1="4x12 Recto Slant" and Amp1="Texas Star Clean" and then switch just Amp1 to "Texas Star Lead" while leaving the Dynacab selection the same: The low end of the curve will change with just the change in amp selection (XFormer Low Freq changes, thus influencing the curve). Some amp selections (ie: "USA SUB BLUES") with the same Dynacab choice above will yield changes to both the hi and low ends of the curve (XFormer Low and Hi Freq Changing) while other amp selections may yield no changes.

This aligns with my understanding wrt the overall curve shown on the speaker page: It is influenced by both the amp and cab models, like irl when unique tonal nuance is generated by connecting a given tube amp AND a given cab.

I guess the confusion comes in if we are just talking about the "Speaker Imp Curve" parameters (Lo/Hi Freq Res + Q), or, if we are talking about the overall curve shown on the speak page - Imo the overall curve is material since that's the curve that applied (not just the speaker side of it).

 

[Joe Bfstplk]

Selecting different amps while leaving the Dynacab selection unchanged yields different curves for me in both AE and FP. Example: Start with Dynacab-Slot1="4x12 Recto Slant" and Amp1="Texas Star Clean" and then switch just Amp1 to "Texas Star Lead" while leaving the Dynacab selection the same: The low end of the curve will change with just the change in amp selection (XFormer Low Freq changes, thus influencing the curve). Some amp selections (ie: "USA SUB BLUES") with the same Dynacab choice above will yield changes to both the hi and low ends of the curve (XFormer Low and Hi Freq Changing) while other amp selections may yield no changes.

This aligns with my understanding wrt the overall curve shown on the speaker page (I call that whole curve IC - maybe we have differing definitions?): It is influenced by both the amp and cab models, like irl when unique tonal nuance is generated by connecting a given tube amp AND a given cab.

The transformer low and high frequency limits affect the way the amp reacts to curve, but are not part of it. The curve is modified by them, and the resulting combined curve is displayed, representing the load seen by the output tubes. The Supro rolls off at about 80Hz, and that really FUBARs the low end of the resulting curve....

 

[Rex]

The impedance curve represents the impedance of the cab the the amp is connected to. It’s what the amp reacts to. It’s not a characteristic of the amp itself.

 

[unix-guy]

The transformer low and high frequency limits affect the way the amp reacts to curve, but are not part of it. The curve is modified by them, and the resulting combined curve is displayed, representing the load seen by the output tubes. The Supro rolls off at about 80Hz, and that really FUBARs the low end of the resulting curve....

The impedance curve represents the impedance of the cab the the amp is connected to. It’s what the amp reacts to. It’s not a characteristic of the amp itself.

You guys beat me to it.

 

[sprint]

The transformer low and high frequency limits affect the way the amp reacts to curve, but are not part of it. The curve is modified by them, and the resulting combined curve is displayed, representing the load seen by the output tubes. The Supro rolls off at about 80Hz, and that really FUBARs the low end of the resulting curve....

The impedance curve represents the impedance of the cab the the amp is connected to. It’s what the amp reacts to. It’s not a characteristic of the amp itself.

You guys beat me to it.

I dunno guys - sounds kinda semanticy to me:

- If I twiddle those XFormer Frequency knobs they make audible changes also visible in the displayed graphic curve on the speaker page. Changing just amp as in the example above, changes those parameters. Ok, lets call it "the amp's reaction to the speaker's impedance curve". But, regardless: as per my initial point: we have a unique character generated when a given amp is combined with a given cab - the curve represented on the speaker page (and the noise that goes with it) is influenced by both the cab selection and the selected amp's reaction via its Xformer Freq's influence on speaker curve - not just the cab selection (that better?).

 

[Rex]

How does one become a beta tester? Sworn allegiance? Fractal face tattoos? Make-a-Wish Foundation?

(no, but seriously, I've beta tested music software before)

I don't claim to know all the factors that go into the selection of Fractal beta team members, but I do know this: everyone whom I've ever seen get the invitation already had a long track record of knowledgeable contribution to the forum and a generous attitude toward forum members.

 

[unix-guy]

I dunno guys - sounds kinda semanticy to me:

- If I twiddle those XFormer Frequency knobs they make audible changes also visible in the displayed graphic curve on the speaker page. Changing just amp as in the example above, changes those parameters. Ok, lets call it "the amp's reaction to the speaker's impedance curve". But, regardless: as per my initial point: we have a unique character generated when a given amp is combined with a given cab - the curve represented on the speaker page (and the noise that goes with it) is influenced by both the cab selection and the amp selected's reaction (that better?) - not just the cab selection.

The curve you see in the Amp block is the Amp's response to the selected SIC.

There's no "extra" component required from the amp.

The amp model + the SIC is all that's required.

 

[Rex]

- If I twiddle those XFormer Frequency knobs they make audible changes also visible in the displayed graphic curve on the speaker page.

Okay, you're right. I did not expect that to happen. My understanding of the speaker impedance curve — as displayed on the hardware or in the editor — is just that: the impedance that the speaker presents to the amp. It's not a frequency response curve. The Xformer Frequency parameters appear to be exceptions to that.

 

[Joe Bfstplk]

I dunno guys - sounds kinda semanticy to me:

- If I twiddle those XFormer Frequency knobs they make audible changes also visible in the displayed graphic curve on the speaker page. Changing just amp as in the example above, changes those parameters. Ok, lets call it "the amp's reaction to the speaker's impedance curve". But, regardless: as per my initial point: we have a unique character generated when a given amp is combined with a given cab - the curve represented on the speaker page (and the noise that goes with it) is influenced by both the cab selection and the selected amp's reaction via its Xformer Freq's influence on speaker curve - not just the cab selection (that better?).

Not "semanticy" at all if you get into the nuts and bolts of amps and how they work.

In a nutshell:

There's a WHOLE LOT of UGLY MATH left out for your viewing enjoyment, lest you end up looking like this:

• The output transformer is a part of the amp, with known properties such as frequency response.
  
  
• The speaker impedance curve is a known property of the speaker(s) in that particular speaker cab.
  
  
• The output tubes see an impedance curve that is the combination of the two. The frequency limitations of the output transformer affect the way the speaker is driven by the output tubes (through the transformer), and the way that AC flyback voltage from the speaker impinges upon the output tubes' operation.
  
  
• The curve you see in the display is the curve the output tubes see, which is the speaker impedance curve, as it is affected by the transformer's frequency response. For simplicity's sake, the display is labeled as the speaker impedance curve, since that is the majority of the curve's shape.

 

[Joe Bfstplk]

Okay, you're right. I did not expect that to happen. My understanding of the speaker impedance curve — as displayed on the hardware or in the editor — is just that: the impedance that the speaker presents to the amp. It's not a frequency response curve. The Xformer Frequency parameters appear to be exceptions to that.

The low and high frequencies that the transformer can't easily pass affect the impedance seen by the tubes, which is why they affect the curve shown, which is a composite of the impedances between the tubes and the speaker-to-air interface. The impedance curve affects frequency response in a way.