how do i/you make impulses
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- KVRian
- 897 posts since 2 Aug, 2001 from norway
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- Banned
- 897 posts since 8 Jan, 2005 from Detroit
Voxengo Impulse Modeller is one way to do it...
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- KVRAF
- 12235 posts since 18 Aug, 2003
If you want to make something useful but isn't a response of an actual space or gear, just take a sample of white noise and alter in any way you can think of.
For getting the impulse response of real things and spaces, read this article as an intro.
For getting the impulse response of real things and spaces, read this article as an intro.
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- KVRist
- 34 posts since 13 Jan, 2006
Never heard of Voxengo Impulse Modeller before -- seems kind of weird to be taking impulse responses of a software reverb emulation (although I'm sure it's much more elaborate than your average plugin reverb... which is why you have to generate IRs from it instead of just running it in real-time in your DAW).
The way most of them are made is by setting up extremely accurate, high-quality recording equipment, and recording a swept sine wave (or other sound with a broad range of frequency content) in the space. Then, a deconvolution program is used to make sense of the recording (I imagine it does some sort of spectral analysis, to determine how the space in question responds to the different frequencies). Of course, you don't actually *have* to give the deconvolution program a clean, unedited recording of a room; you can do all sorts of horrible nasty things to the audio to create all sorts of bizarre impulse responses that defy the laws of physics and couldn't possibly exist in the real world (this, I believe, is what the guys over at Spirit Canyon Audio do).
The way most of them are made is by setting up extremely accurate, high-quality recording equipment, and recording a swept sine wave (or other sound with a broad range of frequency content) in the space. Then, a deconvolution program is used to make sense of the recording (I imagine it does some sort of spectral analysis, to determine how the space in question responds to the different frequencies). Of course, you don't actually *have* to give the deconvolution program a clean, unedited recording of a room; you can do all sorts of horrible nasty things to the audio to create all sorts of bizarre impulse responses that defy the laws of physics and couldn't possibly exist in the real world (this, I believe, is what the guys over at Spirit Canyon Audio do).
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- KVRian
- Topic Starter
- 897 posts since 2 Aug, 2001 from norway
ok, good serious reading there.. but i was thinking maybe slightly different 
For example, I want to capture a plastic bucket's impulse, or the cell phone speaker, a bath-tub etc
so reading the article, basically, i just need to create as much (white?) noise as possible in the space, and record it. so putting one of the small marshal amps into the shower cabinet with a mic could make a fun or maybe totally useless impulse
For example, I want to capture a plastic bucket's impulse, or the cell phone speaker, a bath-tub etc
so reading the article, basically, i just need to create as much (white?) noise as possible in the space, and record it. so putting one of the small marshal amps into the shower cabinet with a mic could make a fun or maybe totally useless impulse
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- KVRAF
- 6504 posts since 25 May, 2002 from Bobo-dioulasso\BF__Geneva/CH
A thing you can try is to sample some complex harmonies basically made with simple waveforms as Impulse responses related to harmonies
This is something i began to explore, looking for the creation of harmony-related I.R. though i'm do not yet have found the best combination of space simulation simultaneusly related to harmonies and predefined scales
But i'm persuaded there is something to dig out of this, actually i've experienced the recreation of resonators with some sine waves harmonies ( in fact an entire major scale on 8 octaves with 64 voices something basic as you can see ) used as I.R. in space designer...
This is something i began to explore, looking for the creation of harmony-related I.R. though i'm do not yet have found the best combination of space simulation simultaneusly related to harmonies and predefined scales
But i'm persuaded there is something to dig out of this, actually i've experienced the recreation of resonators with some sine waves harmonies ( in fact an entire major scale on 8 octaves with 64 voices something basic as you can see ) used as I.R. in space designer...
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- KVRAF
- 1743 posts since 3 Dec, 2004
Voxengo Deconvolver has given me some good results.
Generate a sweep, play/record it, deconvolve with this app & presto!... impulse response
http://www.voxengo.com/product/deconvolver/
Generate a sweep, play/record it, deconvolve with this app & presto!... impulse response
http://www.voxengo.com/product/deconvolver/
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- KVRAF
- 10286 posts since 17 Sep, 2004 from Austin, TX
I recorded fireworks bouncing off the skyscrapers where my band practiced on the rooftop penthouse of a building with a stereo mic then a friend deconvolved it into an impulse with Voxengo. Then he loaded it into RayVerb to use & sent the original recording into another channel in Rayverb & showed me various mixtures of the two. It is HUGE.
I think that just using a sharp, quick noise in a bucket would work pretty well but offhand I can't think of a way to contain the sound to the bucket.
I think that just using a sharp, quick noise in a bucket would work pretty well but offhand I can't think of a way to contain the sound to the bucket.
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- KVRAF
- 5350 posts since 8 Aug, 2003 from Berlin Germany
Is there a free deconvolver out there? If so which one has the most flexibility?
Also if I get an IR of my room (using my recording Mic in my recording position), is there a way to use that to remove the ambience from recordings?
Also if I get an IR of my room (using my recording Mic in my recording position), is there a way to use that to remove the ambience from recordings?
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- KVRAF
- 5350 posts since 8 Aug, 2003 from Berlin Germany
I just used some tabla samples as an IR... It totally replaced the whole drum loop with tablas! Awesome.
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- KVRAF
- 1789 posts since 17 Mar, 2004 from Bretagne, the west of France
An airbaloon and a needle would do ?runagate wrote: I think that just using a sharp, quick noise in a bucket would work pretty well but offhand I can't think of a way to contain the sound to the bucket.
