Awesome binaural effect

[bengersfood]

Has anyone used Tom Erbe's Bianaural plug in?

http://www.soundhack.com/shapers.php

[dalor]

Has anyone used Tom Erbe's Bianaural plug in?

I just played around with it and didnt got a 'controlled' result - i haven't read the docs too i admit, so my opinion on it doesn't really count.

For a detailed, total control for audio in 3d-space i recommend spinaudio 3D Panner Motion Effects.

[haydxn]

i'm pretty sure this was done with HRTF stuff. i'm sure that's the only kind of math/technology that can achieve anything like that

[Kim Lajoie]

I was thinking "Yeah, another dude who just discovered Haas crossover delays" ... and then it did the thing where the sound goes down and then up! HOLY CRAP ON A STICK! I didn't know that was even possible!

I'd never use it in a piece of music, but just for curiosity's sake I NEED TO KNOW HOW THAT WAS DONE!

Forever,




Kim.

[cron]

Astonishing!

Hope this is covered in the psychoacoustics module I'll be doing next year.

[haydxn]

well, the theory is about things called "Head Related Transfer Functions", and is to do with the way sound enters the ears.

the first two things that grant us spatial perception of a sound's origin result in our ears being a distance apart; the sound in the 'far' ear recieves the sound LATER and QUIETER than the 'near' ear (for a sound that originates to the side). of course, it's only milliseconds, and the level difference isn't the kind of thing you'd notice when comparing signals, but the brain is adept at comparing between ears (it has been practising since you were born, although there is probably some kind of innate process too..)

that allows us to hear left/right position. and you probably already knew that...

but the 'level' difference is more precisely a frequency content difference. low frequencies have a tendency to wrap around objects (depending on their relative wavelength/size relationship) whereas higher frequencies travel in more straight lines (not so likely to diffract). that's one thing that changes the content; your ears are a funny old shape for a reason tho...

because of all the ridges and swirls in your ear, sound coming from one direction will be manipulated in an almost unique path of reflections via those ridges to the ear canal.. a different direction would pass different parts of the head/ear/shoulders, and so the frequency content would be changed..

the brain is able to compare the two signals and place the sound in a 3D field.

that's roughly the theory behind HRTF...

[Metanol]

Hmm. Quite intersting. I am curious if this kind of effect is possible with impulse-response reverbs. Of course somebody has to first do the impulse-response with whatever this is effect is done.
Possibly with dummy head with mics inside the head?


edit. I will later this evening or possibly night (whenever I will be home) try to use this mp3 to make impulse-response and to see what it does. If somebody has time to try it before me, please tell if it works.

[haydxn]

i guess it could be possible with convolution reverb or something (all filtering involves some form of convolution), but to use an impulse response would have two main problems:

the two signals will need to be altered differently (one impulse response per 'ear')

one impulse response would be correct for one direction (therefore TWO impulse responses per direction...)

unless there was a neat algorithm that could 'alter' the impulse response in the 'correct' way for the directions... i'm not sure that would be possible but it would be cool if someone pulled it off, and i'd buy them a pint for sure, because i can't imagine it being anything like achieveable

[Gymnopedies]

There is no processing whatsoever involved in the original recording.

This is straight forward binaurel recording, I have two different types of binaurel mics; the most dramatic being a pair that are placed inside the ears to record sound exactly as it is percieved this is the HRTF.

When you record this way you actually do hear/experiance not only depth of sound field but also dramatic horizontal placement/ movement as well.

I have enviromental binaurel recording's that I've made that I cant even listen to on headphones, the sensation is so real that it's disturbing to my sense of space & reality.
I keep having to take off the headphone to visually check to see that no-one else is in the room w/ me.

It's quite unnerving

[JonnySun 2.0]

The mp3 is awesome

I think musicians can benefit from this technique. I think it opens up a new dimension of mixing art. I only know the spinaudio-3D-plugs that came with different HRTF-Filtersets if you buy it. Demo-Versions use only one filterset afaik.

A guy i visited and who is involved and has the knowledge in this things said the HRTF-Responses are often too short? Can't remember what he said

I would pay 200 Euro for a plug which can make this effect in this demo-mp3. (in this quality)

[haydxn]

ahh of course

whyterabbyt was telling me once about a film which had its audio recorded in that way, and it is amazing to watch it with headphones on...

i can't remember what it was called tho! but i'd sure like to get hold of some mics like that! just had a google and found some... i might have to invest in some-o-these

[[ Lex ]]

Impulses
Premises Studio 1 Impulse Responses
"Because these responses are multi-positional, they allow you to place your “performers” into one of 36 possible locations within this single environment."

Application:
Ambisone 3D positioning plug in
"Let Ambisone place your tracks in virtual 3D sound space without requiring costly encoders or playback equipment"


Have fun

/ Lex Strooder

[haydxn]

i just tried out that ambisone... it's rubbish!

[Kim Lajoie]

There is no processing whatsoever involved in the original recording.

This is straight forward binaurel recording,

I believe you, but how can you tell? Is it that no software is that realistic (yet)?

I have two different types of binaurel mics; the most dramatic being a pair that are placed inside the ears to record sound exactly as it is percieved this is the HRTF.

When you record this way you actually do hear/experiance not only depth of sound field but also dramatic horizontal placement/ movement as well.

I have enviromental binaurel recording's that I've made that I cant even listen to on headphones, the sensation is so real that it's disturbing to my sense of space & reality.
I keep having to take off the headphone to visually check to see that no-one else is in the room w/ me.

It's quite unnerving

I want to heat this!

Forever,




Kim.

[Gymnopedies]

Here's the link to the Binaurel mic's I use:

http://www.soundprofessionals.com/cgi-b ... m/SP-TFB-2

Great company BTW, All kinds of interesting gizmos to expand the horizons of music, Great Quality & Low Cost too!