Right now that i'm fooling around with sample editing related to impulse responses, there is one question that comes to mind
i had a look on the past days on some sites ( zplane, serato, celemony, prosoniq ) that seems to make a lot of progress in qualiy and my question is :
Can someone tell me on how accurate these new time stretch technologies can be, if applied on impulse responses, if you want to target the ROOM SIZE suggested by the IR of a natural space, ( room, cathedral, outdoor spaces etc...,etc...) without affecting the other significant acoustical aspects as much as possible
I mean that it's easy to transpose up or down a sample of the IR of a natural space, but
1)- you will change it duration
2)- transpose all the timbral charateristics as well
3)- loose one extreme or the other of the spectrum, shifting away from our audible bandwith
Do you think that actually it could make sense to apply these time-stretching technologies to Impulse response ?
_________
( As well as transposition of IR related to the search of a chromatic accuracy, as actually debated on the SKnote forum )
A question about time stretching accuracy related to IR ?
-
- KVRAF
- 6504 posts since 25 May, 2002 from Bobo-dioulasso\BF__Geneva/CH
-
- KVRAF
- Topic Starter
- 6504 posts since 25 May, 2002 from Bobo-dioulasso\BF__Geneva/CH
I just realise a nonsense it this idea, it SHOULD change duration of the sample if you want to change a suggested room size !
( except maybe... ? )
( except maybe... ? )
-
- KVRAF
- 8731 posts since 24 May, 2002 from Tutukaka, New Zealand
Hmmm...if I'm going to be real honest...I wouldn't touch your idea with a rather long and slimey bargepole.
I've not heard any timestretching yet that doesn't in some way affect the character of the audio badly. For some IRs, that might not be quite so important, but when I'm using convolution specifically to get quality reverb because most native reverbs aren't up to much...then I surely don't want to degrade the IR quality unless I absolutely have to. I'd rather search for another more suitable IR than stretch anything.
I almost never stretch even drumloops. I tried allsorts, and even on very slight stretching on all type of algorithms, I just hate the way the bass end starts to sound really metallic/tinny. I hate it so much and notice it so much that I prefer to go through the hassle of manually slicing a loop by hand than stretch it. If I can hear the difference on simple loops so easily, I just know that a big boomy hall or whatever is going to sound dreadful if the reverb IR is stretched - it's the mids and lower mids that often clinch the character of a hall or big room. I wouldn't trust timestretching to not f**k it up beyond recognition.
Just my opinion...maybe my ears are sensitised to timestretching...maybe others don't notice, or aren't bothered by it - I hate stretching though; It's nasty and it'll be a few years yet (IMO) before it's good enough quality to use effectively. As a special FX, no problem...just not as real stretching. Time shrinking ain't quite so bad...but that stands to reason, as stuff can be taken out of audio far more easily than you can add stuff into it.
I've not heard any timestretching yet that doesn't in some way affect the character of the audio badly. For some IRs, that might not be quite so important, but when I'm using convolution specifically to get quality reverb because most native reverbs aren't up to much...then I surely don't want to degrade the IR quality unless I absolutely have to. I'd rather search for another more suitable IR than stretch anything.
I almost never stretch even drumloops. I tried allsorts, and even on very slight stretching on all type of algorithms, I just hate the way the bass end starts to sound really metallic/tinny. I hate it so much and notice it so much that I prefer to go through the hassle of manually slicing a loop by hand than stretch it. If I can hear the difference on simple loops so easily, I just know that a big boomy hall or whatever is going to sound dreadful if the reverb IR is stretched - it's the mids and lower mids that often clinch the character of a hall or big room. I wouldn't trust timestretching to not f**k it up beyond recognition.
Just my opinion...maybe my ears are sensitised to timestretching...maybe others don't notice, or aren't bothered by it - I hate stretching though; It's nasty and it'll be a few years yet (IMO) before it's good enough quality to use effectively. As a special FX, no problem...just not as real stretching. Time shrinking ain't quite so bad...but that stands to reason, as stuff can be taken out of audio far more easily than you can add stuff into it.