Kjaerhus Classic Reverb prob
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- KVRist
- 177 posts since 31 Oct, 2004 from Nærum, Denmark
Hi! Today I was playing with the Classic Reverb, and I experienced a feedback tone when the pre-delay time was set to negative. Anyone experience this? And why can the pre-delay be set to negative at all???
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- KVRAF
- 9220 posts since 23 Jul, 2002 from Pequot Lakes, MN
Yeah, I could see it happening with a small room size and no damping with the right frequencies sent through it. Turn the damping up.
As to why negative pre-delay? You can do reverse reverbs that way
ew
As to why negative pre-delay? You can do reverse reverbs that way
ew
A spectral heretic...
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- KVRist
- Topic Starter
- 177 posts since 31 Oct, 2004 from Nærum, Denmark
Thanx!
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- KVRian
- 769 posts since 2 Apr, 2005
I like Classic Reverb very much, and for a freebie you can't expect perfection. However - my take on what is happening here is this:
Classic reverb seems to be modeled on reflections based on the physical dimensions of the space (which you choose in square meters). Obviously, with the very large spaces that it can do, the delay time for the first reflection (based on the speed of sound) is going to be quite long.
Try zero predelay and choose the biggest room - there is a long natural pre-delay. Being an artificial reverb, you might want to reduce this predelay by using some "negative" predelay.
Obviously not all reverb designers use this method - most fudge things a bit so that not matter how big the room, there is little predelay unless you add some. I probably prefer that approach, because there is nothing real about digital reverb anyway.
I've never heard a feedback tone with this - might depend on the host.
Classic reverb seems to be modeled on reflections based on the physical dimensions of the space (which you choose in square meters). Obviously, with the very large spaces that it can do, the delay time for the first reflection (based on the speed of sound) is going to be quite long.
Try zero predelay and choose the biggest room - there is a long natural pre-delay. Being an artificial reverb, you might want to reduce this predelay by using some "negative" predelay.
Obviously not all reverb designers use this method - most fudge things a bit so that not matter how big the room, there is little predelay unless you add some. I probably prefer that approach, because there is nothing real about digital reverb anyway.
I've never heard a feedback tone with this - might depend on the host.
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- KVRAF
- 10597 posts since 13 Jun, 2004 from Alberto Balsam
not true reverse reverb. Reverse reverby sounds, though.greendoor wrote:Eh? I don't think you can do reverse reverbs at all!