To get the optimum results the length should be 170 ms or more. As the length gets shorter you'll lose information. However there may not be any information to lose. It all depends on the IR. I've seen long IRs where only the first 100 ms or so is actual information and the rest is silence. OTOH I've seen 100 ms IRs where there is obviously more information but it got truncated.My curiosity boils down to this:
I have heard 2 different things. I have heard that the minimum file length you need to make an ultrares cab is 80 ms, but then I've heard that you need a wav length of 167 ms to really feel the effect of it. So if I take the current OH IR wav files that I have and make them into ultrares cabs, will I notice it? My understanding is that the .wav files he bounced are around 100 ms. :-|
You can't mix UltraRes IRs as the data is not compatible. However... we foresaw that and the UltraRes conversion process produces two files: a .ir file and a .syx file. The .ir file is the raw IR data that can be imported into CabLab for mixing purposes. So CabLab can take .wav, non-UltraRes .syx and .ir files as input to the mixer section and product UltraRes .syx files.What happens if a short IR (AxeII syx pre-UltraRes) and an UltraRez IR are mixed in Cab Lab? Will the result be UltraRes or pre-UltraRes AxeII syx?
No, you can just use the wave files. The different lengths are not optimal but I doubt it would be audible.So will each IR have to be converted to URes files before we mix into Cab-Lab? Or will we, let's say, be able to make up a mix with a bunch of .wav files and export it as one URes IR when we are done mixing? And further, if each file is truncated at different ms values, is that going to screw up the conversion?
Note that CabLab doesn't support UltraRes yet. It will soon and any existing users will get a free update.Cool! I picked up Cab-Lab this evening after FW13 dropped. I am looking very much forward to trying out all the different IRs I've got in wave format. I might even go back and visit the ol' Redwirez bundle... we'll see.
I was excited about converting my RedWirez collection also, but I don't think they will benefit much. They are only around 100ms long, and thus less than the 170ms required for UltraRes. Can't hurt to try though...Cool! I picked up Cab-Lab this evening after FW13 dropped. I am looking very much forward to trying out all the different IRs I've got in wave format. I might even go back and visit the ol' Redwirez bundle... we'll see.