But flattening the response of our power amp would be obviously the next step ! It would be really great. I won't have to choose between a Matrix or a QSC or a Brixton power amp anymore with my cab.
I don't know if the same technology could be used for this but if yes and assuming people are ready to capture their cabs using a DI box to capture the response of their power amp too, they will be OK to do the same to amplify their Axe and get the best of it, with no more coloration of the power amp. Moreover, it could (I don't know) be a good way to simplify the search for the right settings in the Axe when connecting it to a power amp : the Axe could adjust alone things like Low Frequency Resonance...
IMHO this should work if you replace the miced cab with flat cable.
Bring the capture sweep (OUT2L) straight back to IN2L (split the output). So the Axe will see a flat response as "cab" WITHOUT Amp.
The second cable -> Power Amp -> DI through -> load (speaker) & DI line out to IN2R.
This should result in the inverted (non-linearity) IR of the actual Amp (with dedicated Speaker-load) (
minus Amp). In fact you can do the same with the TMA block (and get the sine sweep from the synth block), without having to split the signal chain. I assume, this would give more accurate results.
Note: For every Amp & Speakerload combination you`ll have to do a dedicated correction IR. These dedicated correction IRs will only make sense, when used with the signal chain of the actual Amp/Speaker combination (
plus amp).
(
minus amp plus amp = no amp)
If this will make sense in praxis is another question ...
In other words: People who make their own IR captures of their own cabinet (Axe->Amp->Guitar cabinet) to feed for example a DI signal with their own cab as IR to FOH should NOT use this new method, because they audition the miced cab through the actual amp/cabinet configuration. So, the audition and setup their Axe-Sound and mic to capture the IR WITH the imperfection of the given signal chain. So, if they are satisfied with that sound they hear, they should capture that sound for FOH, means: capture als the "imperfection". To substract the Amps imperfection will result in another frequency as they heard when finding mic positions to capture ...
In more words: In the future Axe-lovers should excatly know and understand which route of captured IRs they use and why!