KVR Audio

Frippertronix · Post by **Frippertronix** » Wed Oct 05, 2005 2:10 am

If not, can someone explain the concept/necessity behind it? The website is in German.

http://www.kvraudio.com/get/1143.html

Thanks, Dave

LIMITAPROACHINGINFINITY · Wed Oct 05, 2005 2:25 am

"The idea behind RS Exact Delay is a 100% accurate computation of the deceleration time in consideration of the effects of temperature on the speed of sound.
"

The only thing bogus looking is the word deceleration.. Audio does not decelerate through a constant demperature.. It travels at a const. velocity.. If there was a change in temperature (say a gradual increas/dec, then it would decel or accelerate).. Other than that it looks good.

bill fusion · Post by **bill fusion** » Wed Oct 05, 2005 3:29 am

Ahhh yes sound speed does change with temputure , air presure, or moluclear desinity. Sound travels much faster though water and rock then it does air, another way to look at it is ever go out on a cold air morning and hear a freeway yet on a warm morning it is not there at all

LIMITAPROACHINGINFINITY · Wed Oct 05, 2005 4:22 am

What your talking about is not velocity of propagating sound waves but i think you're talking about dampening the amplitude.. Never heard of it but sounds interesting.

Frippertronix · Post by **Frippertronix** » Wed Oct 05, 2005 4:50 am

I just wonder how this will improve recordings, and if different air densities are really going to matter inside as small a space as a recording studio (though maybe in an arena or concert hall it might matter).

duncanparsons · Post by **duncanparsons** » Wed Oct 05, 2005 6:51 am

Thing is, temperature isn't the only factor - dust particles, extraneous gases, water vapour, etc all alter instantaneous densities, and really it's density that count.

Temperature is an average, and arguably doesn't really exist in itself.

Having said that, this is a laugh. I'm not going to download, but surely it should work as more than just a single delay - delay certain frequencies to create an spectral imbalance? (since warmer temperatures will emphasise diff Freqs, delaying and attenuating, etc)

O well, ta for the heads up

DSP

ezeeboogie · Post by **ezeeboogie** » Wed Oct 05, 2005 11:56 am

Frippertronix wrote:If not, can someone explain the concept/necessity behind it? The website is in German.

http://www.kvraudio.com/get/1143.html

Thanks, Dave

Actually the site is in english too! Look at the flags below the right hand menu and you will see the option.

scum · Post by **scum** » Wed Oct 05, 2005 1:29 pm

it is just the next pc-made shit

Meffy · Post by **Meffy** » Wed Oct 05, 2005 1:37 pm

Sound's speed does NOT vary with changes in static air pressure. (I made that mistake a month or two ago, then looked it up and corrected myself.) Temperature, yes. Humidity, a little. Pressure, no.

To detect my error I used my old physics textbooks. Easier is Wikipedia:

http://en.wikipedia.org/wiki/Speed_of_sound

The page linked to above refers to this short explanation:

http://www.sengpielaudio.com/SpeedOfSoundPressure.pdf

Frippertronix · Post by **Frippertronix** » Wed Oct 05, 2005 10:47 pm

scum wrote:it is just the next pc-made shit

greendoor · Post by **greendoor** » Wed Oct 05, 2005 11:07 pm

It's amazing how easy it is to stir up ignorance. If ignorance is truely bliss, this post seems to have made a few people ecstatic.

"PC made shit" is equally good, if not vastly superior, to a lot of other options. Not all VST plugins are intended for bedroom wannabies making 'tarnce'.

The purpose of this VST is very simple and well explained. IF you are recording with widely spaced multiple mics, you will get delay differences that need to be compensated for. You can measure the distance, and you can measure the temperature. It makes perfect sense to use a VST delay that allows you to enter these parameters to create the necessary delay to align up your mics (probably for classical orchestral recording).

The Chase · Post by **The Chase** » Wed Oct 05, 2005 11:11 pm

scum wrote:it is just the next pc-made shit

^^at least he chose a proper nick

Frippertronix · Post by **Frippertronix** » Thu Oct 06, 2005 1:47 am

greendoor wrote:It's amazing how easy it is to stir up ignorance. If ignorance is truely bliss, this post seems to have made a few people ecstatic.

"PC made shit" is equally good, if not vastly superior, to a lot of other options. Not all VST plugins are intended for bedroom wannabies making 'tarnce'.

The purpose of this VST is very simple and well explained. IF you are recording with widely spaced multiple mics, you will get delay differences that need to be compensated for. You can measure the distance, and you can measure the temperature. It makes perfect sense to use a VST delay that allows you to enter these parameters to create the necessary delay to align up your mics (probably for classical orchestral recording).

Wasn't aware that even "widely spaced" mics (i.e., what, 30 feet apart?) would even result in any kind of even vaguely audible delay differences. Sounds like picking nits to me.

greendoor · Post by **greendoor** » Thu Oct 06, 2005 2:15 am

It's called phase issues. Engineers who use multiple mics (even as simple a thing as one drumkit) have enormous problems. Some will use tape measures, trying to get the sound sources aligning right.

Imagine an orchestra, where the players are maybe 100 feet apart. The speed of sound is, very roughly, 333 meters per second. So 100 feet (roughly 33 meters) would take around 100ms. That is a huge delay!

If you are running a large PA in a park, and you have a stack of speakers 200 feet away from the main stage, it's a good idea to delay the sound, so it reinforces the naturally delayed sound coming from the main stage. This plugin would be magic for that job.

Trying applying a 50/50 mix of dry sound and a 20ms delay - and then tell me again that "even vaguely audible delay differences sounds like picking nits to me.
"

Frippertronix · Post by **Frippertronix** » Thu Oct 06, 2005 2:55 am

greendoor wrote:It's called phase issues. Engineers who use multiple mics (even as simple a thing as one drumkit) have enormous problems. Some will use tape measures, trying to get the sound sources aligning right.

Imagine an orchestra, where the players are maybe 100 feet apart. The speed of sound is, very roughly, 333 meters per second. So 100 feet (roughly 33 meters) would take around 100ms. That is a huge delay!

If you are running a large PA in a park, and you have a stack of speakers 200 feet away from the main stage, it's a good idea to delay the sound, so it reinforces the naturally delayed sound coming from the main stage. This plugin would be magic for that job.

Trying applying a 50/50 mix of dry sound and a 20ms delay - and then tell me again that "even vaguely audible delay differences sounds like picking nits to me.
"

I guess all that is true, but I was thinking in studio terms when I started this thread, since most people looking for free vstware are recording in their basement rec room or bedroom. It doesn't surprise me that (as I indicated in an earlier post), people doing sound for a large venue need it, but they have that kind of thing already incorproated into their professional setups. Actually, after you broke down the speed of sound into meters per second I can see that the issue is a probably a bigger problem in more circumstances than I would have thought.

It wasn't so much the distance delay compensation that made me scratch my head on this one, more the temperature part of it, but I guess if sound really slows down or speeds up with air temperature it may be a necessary parameter for total accuracy (as the name of the plug implies).

Is this a joke?