Quote:
Originally Posted by
Chagalj
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Sorry to jump in with question which is maybe covered in previous posts:
Is oversampling something that takes care of aliasing made by lower resolution samples processing? And if we record in, say 88.2 or 96kHz oversampling is useless?
Also, with plugins in oversampling mode x2, x4, theres no need for higher resolution sampling than 44.1 or 48kHz?
Im getting kind of confused with all this.
This is an excellent question. Since there are two sample rates 44.1 and 48 kHz, I am going to refer to everything as multiples of this base rate otherwise things get long winded. So:
x1 = 44.1 kHz or 48 kHz
x2 = 88.2 kHz or 96 kHz
x4 = 176 kHz or 192 kHz
x8 = 352 kHz or 384 kHz
I recommend recording at x2 as most of the time you won't need further oversampling when using EQ or mild compression. If you do more strenuous compression or drive the signal then you will most likely need oversampling even on top of this. A good default level is x8, which is then only 2 doublings of oversampling more from x2, and since there is lots more room above 20 kHz since you are already at x2 then the oversampling filter is much more efficient to implement, so the whole oversampling process is smoother and better. You then resample down to x1 for final release only. So if your system can handle it this is what I recommend.
Running sessions at x4 to me is a waste of hard drive and cpu, but until hosts implement oversampling in a more useful manner or all your plugins support oversampling then this may be the only option if you have lots of harmonics from non-linear processing being generated ITB.
Running at x1 may be the only option for some people, but please bear in mind that the cost of oversampling up from x1 to x2 is the hardest to do right, and takes the greatest cpu hit possible, so if you are doing it lots you may actually be better off just running the whole session at x2. Otherwise just pick the places you really need the oversampling to help the most and be happy with that increase in quality - the master buss is a good place to start.