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I would be fascinated to see what the PEQ block does after the cab to the curves. Not a request (I know you aren't here doing anything for our amusement) but it'd be exceptionally interesting to me to look at.
PEQ block - band 1, blocking, 120hz @ .707Q and band 5, blocking, 7110hz @ .707Q.
Well ,I made my own impulse with wavelab's signal generator set to square. Then I zeroed all the samples except for the first one leaving me with the 1st sample at 0dBFS and the rest 4095 at 0 .Voila! text book dirac impulse!
My chain is WinMLS->motu Ultralite III SPDIF out-> AXE-FX SPDIF in -> Cab module-> AXE SPDIF OUT->motu SPDIF in ->winMLS
WinMLS uses log sine sweep to make it's impluse response measurment. I verified my setup by setting the mic to "none" and getting a flat response although the In->Out was not unity gain but this probably due to a mono/ stereo thing.
Boy am I glad to ran across these, many thanks to the OP for this great work, it really SHOULD be on the Wiki so folks designing amp sounds/tones can understand the absolute critical importance of EQ (aside from AMP basic EQ) that Cabs and Mics do before a user goes down "rabbit holes" using Graphic, PEQ, or Global stuff attempting to compensate -- this is very very useful, many thanks!
I have a basic question, why does the IR of the cab played through FRFR seem to have more highs and lows than the cab itself?
It would seem to me the IR would not need to be eq'd to roll off highs and lows since the IR represents the cab/speaker which already "filtered" the sound.
I have a basic question, why does the IR of the cab played through FRFR seem to have more highs and lows than the cab itself?
It would seem to me the IR would not need to be eq'd to roll off highs and lows since the IR represents the cab/speaker which already "filtered" the sound.
Yeah, I posted over on TGP also, it was explained the way the IR is captured makes the difference.
So I guess that means if the IR capture mic were in the same position as the persons ears then the sound of the IR through FRFR would be very similar to the sound the persons ear heard from the original cab/speaker at that location. It makes sense to me now.
Yeah, I posted over on TGP also, it was explained the way the IR is captured makes the difference.
So I guess that means if the IR capture mic were in the same position as the persons ears then the sound of the IR through FRFR would be very similar to the sound the persons ear heard from the original cab/speaker at that location. It makes sense to me now.
How a mic listens to a 4x12 at 5 feet from the cabinet ( or even worse 2" from cone cap) is very very different to how the ear listens to a 4x12 at 5 feet from the cabinet.
Trying to match the 2 actually involves 70 years of science and 40 years of Art.
We are still not there yet...but it doesn't matter because we have to treat the AXE-FX + Impulse +FRFR as a different instrument than AXE-FX+amp+Cab.
I always like to think that if I went back with a time machine and gave an AXE-FX to Hendrix back in 1969 he simply wouldn't bother with plexi's, octavias,univibes and the lot....
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