The best Impulse Response [IR] sites

[grig]

Anyone know of any good exterior impulse reponses? I've found a few hard-wall type things, I'm really after some good natural ambiances such as woods and forests.

I'm searching for a good outdoor impulse too, but a basic one (not forest, avenue, or anything like that).

Have you ever seen something like that?

Thx!
GriG

[numbskull]

Would it be possible to do an Impulse Response for an entire amp (preamp and all) instead of just a speaker or cabinet? For example, an IR of a Marshall head and cabinet, for modeling purposes.

Only when the amp is operating linearly. When it is clipping it must be modeled differently. Search for "linear time-invariant systems" which is the kind of thing that can be impulse modeled, the basic rule is that if you put in exactly one sine wave, you get out exactly one sine wave. The system can change its volume (amplitude) and phase, but *not* its frequency, and it cannot add other frequencies like clipping does.

Mathematically, this is conveniently handled with complex numbers with real amplitude and imaginary phase.

Remember that one way of taking an IR is with a "sine sweep," you're sampling how the system acts on one frequency at a time and the collection of returns (analyzed as amplitude+phase*i complex pairs) *is* the IR.

(Another way is to inject an impulse into the system, "whack it with a hammer," fire a starter pistol. The impulse as a sum of sines is "white noise" an equal amount at all frequencies - the "sine sweep" but played all at once.)

I'm sure I could write more clearly if I had more caffeine. But, in short, a guitar amp's amp is often nonlinear and cannot be impulse modeled.

[liquidsonics]

Some good IRs of real spaces in the UK from OpenAIR.

[Dean Aka Nekro]

Would it be possible to do an Impulse Response for an entire amp (preamp and all) instead of just a speaker or cabinet? For example, an IR of a Marshall head and cabinet, for modeling purposes.

Only when the amp is operating linearly. When it is clipping it must be modeled differently. Search for "linear time-invariant systems" which is the kind of thing that can be impulse modeled, the basic rule is that if you put in exactly one sine wave, you get out exactly one sine wave. The system can change its volume (amplitude) and phase, but *not* its frequency, and it cannot add other frequencies like clipping does.

Mathematically, this is conveniently handled with complex numbers with real amplitude and imaginary phase.

Remember that one way of taking an IR is with a "sine sweep," you're sampling how the system acts on one frequency at a time and the collection of returns (analyzed as amplitude+phase*i complex pairs) *is* the IR.

(Another way is to inject an impulse into the system, "whack it with a hammer," fire a starter pistol. The impulse as a sum of sines is "white noise" an equal amount at all frequencies - the "sine sweep" but played all at once.)

I'm sure I could write more clearly if I had more caffeine. But, in short, a guitar amp's amp is often nonlinear and cannot be impulse modeled.

If you are willing to part with around £1500:

It seems that via dynamic convolution it is totally possible. Looking forward to giving one a whirl anyway when i can

[kvaca]

Would it be possible to do an Impulse Response for an entire amp (preamp and all) instead of just a speaker or cabinet? For example, an IR of a Marshall head and cabinet, for modeling purposes.

Only when the amp is operating linearly. When it is clipping it must be modeled differently. Search for "linear time-invariant systems" which is the kind of thing that can be impulse modeled, the basic rule is that if you put in exactly one sine wave, you get out exactly one sine wave. The system can change its volume (amplitude) and phase, but *not* its frequency, and it cannot add other frequencies like clipping does.

Mathematically, this is conveniently handled with complex numbers with real amplitude and imaginary phase.

Remember that one way of taking an IR is with a "sine sweep," you're sampling how the system acts on one frequency at a time and the collection of returns (analyzed as amplitude+phase*i complex pairs) *is* the IR.

(Another way is to inject an impulse into the system, "whack it with a hammer," fire a starter pistol. The impulse as a sum of sines is "white noise" an equal amount at all frequencies - the "sine sweep" but played all at once.)

I'm sure I could write more clearly if I had more caffeine. But, in short, a guitar amp's amp is often nonlinear and cannot be impulse modeled.

If you are willing to part with around £1500:

It seems that via dynamic convolution it is totally possible. Looking forward to giving one a whirl anyway when i can

this kemper looks promissing
I wish it will be cheap enough so every guitar player can buy one...and hopefully I than will buy their real tube amps cheaper /same as when pod arrived/

[Danielo]

http://www.spiritcanyonaudio.com./convbundle.php

These are great for otherworldly sounds but also work great for standard reverbs.

I 2nd Spirt Canyon's stuff...I use either Spectral Relativity, Kaleidoskopy, or Sanitarium in every track I do.

Daniel
http://danielottinimusic.tumblr.com/

[Famous Dave]

SIR is a great program! Used it for a while but use Perfect Space that came with Sonar now. Have downloaded a lot of free stuff from noisevault that I use with it. Should work with SIR as well. Good luck.

Dave

[leeson777]

AUTO-ADMIN: Non-MP3, WAV, OGG, SoundCloud, YouTube, Vimeo, Twitter and Facebook links in this post have been protected automatically. Once the member reaches 5 posts the links will function as normal.

Hi. I've just started getting in to IR reverbs and after getting set up with liquidsonics LE version and a bunch of great 24bit/44.1kHz IRs I stumbled upon the free version of Halls Of Fame Origami, which sounds amazing - http://www.soundsondemand.com/free_soun ... ition/en/1 (http://www.soundsondemand.com/free_sounds.asp/free_halls_of_fame-origami_edition/en/1)
But all its impulses are 32bit/96kHz which has got me wondering if there are any problems in running lower bit and sample rate wavs through higher bit and sample rate IRs.
Can anyone help me out with an answer to this?
Thanks!
Lee

[standalone]

But all its impulses are 32bit/96kHz which has got me wondering if there are any problems in running lower bit and sample rate wavs through higher bit and sample rate IRs.

No problem at all, don't worry.

[Debutante]

Some good IRs of real spaces in the UK from OpenAIR.

Thanks for that link. I wish there was more there. Those are fantastic

[chilln]

I looked around on the web and couldn't find the Sony DRE777 IRs. Anyone know where they can be found now?

I'd like to know that too

The files section of the 'audio-plugins' group on Yahoo Groups. Someone on another forum had mentioned this; which is how I found them.

[chilln]

Some good IRs of real spaces in the UK from OpenAIR.

Thanks for that link. I wish there was more there. Those are fantastic

+1! Thanks!

[Aukikco]

the updated big L960 stereo set at noisevault was pretty much best in everything.

Is there still some way to grab that somewhere?

Also, the "650 Assorted Cabinet Impulses.rar" linked before didn't work - anyone care to help?

[jancivil]

this thread is an awesome resource! thanks to all that contributed to that!

[midischool]

http://www.echochamber.ch/