richedie":32t61oyc said:
What is an IR???
I tell you, you guys really have me tempted on getting the Fractal rather than get a Randall 100 watt head or the new Egnater 1U. That with a power amp could be a sweet second rig.
How are you liking the Fractal, Eric? Used it with a band yet without the Mods?
an IR is short for impulse responce. And basically what that is, is a recording of a real space, sending a signal through whatever, capturing it, and then the frequency responce that you captured is what you will be hearing when you use them. So really you can record an impulse responce from tons of stuff, some high end digital verbs are using impulse responces to simulate real room environments and the like. in the case of using them for guitar, you can record your favorite guitar cab, and with the appropriate software, route your preamps through that and theoretically it will respond the same as your real cab will. Honestly, using them for cab sims is pretty amazing. The fractal audio axe fx uses impulse responces for cab sims, but it also allows 10 user uploaded spots. There are a few user ir's out there that honestly sound very open, and real in comparison to any digital sim I have used (and analog simulated output). you can almost hear the room in some of them, pretty awesome. I have used my RM$ going into the axe fx and used thier IR's to way better success then I have had with the palmer 03 (and o4), for a few reasons, like the ability to use a stereo cab, assign 2 different speakers etc etc, actually sounded like it had more life then the palmer.
here is a very quick clip I did just testing out using IR;s with my analong pre'. I have posted this before sorry if its old.
http://www.energiestudios.com/Files/Ran ... %20Sim.mp3
I think revalver has the ability to load in ir's, and some of thier cabs sound pretty good based off of clips, its a cheaper way to get into using IR's, cheaper then an axe fx, or palmer, as long as you can take a line out.
Recording a real speaker often times can be amazing, though its not garunteed to sound great, but with a good speaker and proper micing, you can capture that moving air more then a simulated device can, which sometimes is what adds that life. though some cab ir's can sound pretty alive.