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^ that's one there
"Technically, an Impulse Response, or IR for short, refers to a system's output when presented with a very short input signal called an impulse. Basically, you can send any device or chain of devices a specially crafted audio signal and the system will spit out a digital picture of its linear characteristics."
What this means in simple terms is that it's a way of measuring (and therefore recreating) the response of something to an input signal - in guitar terms it's commonly used as a way of modelling what a guitar cab would sound like. The idea is that someone somewhere measures the IR of a cab, then anyone else can use that IR to use a virtual version of that can in an amp model.
https://medium.com/guitar-pedals-amp/how-to-get-a-great-guitar-tone-at-low-volume-without-a-speaker-cabinet-5bfd0371f9f6#.s2z32rold
I enjoyed writing this and hope it helps!
View my feedback at www.thefretboard.co.uk/discussion/comment/1201922
For speakers it's the former. Basically very quickly from 0v to peak voltage as a spike, and you record the sound that makes, the convolve that sound with a guitar signal and it sounds as if you're playing through the speaker.
In practice it's not usually done with just an impulse; there are swoops and bursts of noise and even more clever maths to create the IR from what comes out of the speaker.
Apparently early ones don't have this .....or is that wrong ???
Download, install, enjoy.
Thats pretty much all you need to know about IRs and Helix
i am thinking about making a basic regular non-resistive dummy load & trying to overcome the flatness with diy-on-vero cab sims & cab sim pedals (i don't have funds for a pro resistive load box).
is there any basic advice you would give to people who want to use their main amp (mine is class A 30w with 8 ohm celestion speaker) for silent (small flat) recording but have minimal means?
or maybe a modest modelling set-up better than a great amp through a flat non-reactive load?
i'd be interested to hear your thoughts.
Heres a response I had on another thread
"Just one thing you might want to mention on there...the AMT PE-15 is a 15W reactive load box which works fantastically well. I've used it with my 20W and 50W Jet City amps - as long as you keep the volume reasonable and stay out of the red on the indicator, there's no danger at all. Even a 50W amp running at less than 15W sounds great like that. The main point here is the price - £110 or thereabouts, and about £100 if you use The Fretboard's discount on the AMT UK site"
This could be helpful. You don't need a pedal to import IRs onto, you can use software to load then into, if you have a computer and a soundcard that can take the signal from your load box.
I'll be writing another post to cover some cheaper options that the ones I discussed in my first post. :-)
View my feedback at www.thefretboard.co.uk/discussion/comment/1201922
my class A combo is 30w 8ohm (with 8ohm jack out to a cab), so i would be wary of popping the amt if it is only meant for 15w. i'm just so scatty & absent-minded & i think i would forget the levels & turn it up without thinking.
i keep everything i use as foolproof as poss for that reason. even taking knobs off pedals to remind me not to change settings. i have tried but can't change my limitations so, i have learned to change my environment to deal with that. just me.
i will check out the demos & read reviews just to see, though. maybe it is very tough.
would be great to see a do-it-on-a-budget version of your orig article. will look forward to.
View my feedback at www.thefretboard.co.uk/discussion/comment/1201922