AW: adsr and lfo abolish (Don goes off the deep end again)

[Fraser, Colin J]

> -----Original Message-----
> From: Sean Costello [mailto:costello at seanet.com]
> Sent: 13 April 1999 19:51
> To: Geren W. Mortensen, Jr.
> Cc: 'synth-diy at mailhost.bpa.nl'
> Subject: Re: AW: adsr and lfo abolish (Don goes off the deep 
> end again)
> 
> The highly frequency specific filtering of the pinnae. A sound from
> above will have notches in its spectrum in a far different 
> place than a
> sound from below, because the curves of the pinnae will 
> cancel out some
> frequencies and emphasize others. This is the principle of HRTF 3-D
> audio from stereo speakers. Of course, it helps if your ears 
> are exactly
> the same shape as the ears used to make the HRTF measurements.

You can make up a very cheap set of binaural microphones by using those
small electret mic elements and fitting them inside your ears.
If you make binaural recordings with your own head, they will carry all the
directional information your brain needs to get full 3d perception when you
play back your recordings on headphones. Other people should also hear the
3d effect, but it always works best for your own head.


Colin f

PS did you know that hippos can tell exactly how far away a rival male is
from the time difference between his calls heard above and below water due
to the difference in the speeds of sound in air and water. Human hearing
ain't that good.