[sdiy] re : Oh god, not the Circular Waveform Again! ( was something else )

[rkmoore at memphis.edu]

I'm aware of a couple of audio illusions.  I know that you can "fake" 
the presence of a low fundamental by playing the "would-be" upper 
harmonics.  Buchla makes an infinte phase shifter that does the barber 
pole effect with phase instead of pitch, but I'm not sure how it's 
done.  I guess this next one isn't an illusion, but I like the noise I 
get when I sample a high pitched sound on my EPS and then I increase 
the pitch by several octaves.  I can then sweep the pitch and get all 
sorts of bizarre aliasing pitches that don't seem to have an audible 
relationship to each other (convolution can be fun!).

Richard Moore

----- Original Message -----
From: Tom Arnold <xyzzy at sysabend.org>
Date: Saturday, November 20, 2004 1:39 am
Subject: Re: [sdiy] re : Oh god, not the Circular Waveform Again! ( 
was something else )

> I'm gonna reply to myself with a question because I'm that sorta 
> guy...
> The Sheppard Generator ( one of which I dont yet own, but I will 
> in a few
> minutes as I'm sitting down for a nice nights Scenix coding ) is 
> an audio
> illusion, a "circular sounding" constantly rising or falling 
> sound.  What
> other audio illusions are there?
> 
> I think, besides interface, audio illusions are one of my pet 
> interests.  I
> also play with vocal illusions, making music ( or attempting to ( 
> but I came
> up with a name so maybe I'll finally put some stuff up for people 
> to hear )
> ) that uses phonemethe sound and keeps trying to hear something 
> that isnt there ( speech ).
> 
> -- 
> ------------------------------------------------------------------
> ------
> - Tom Arnold -       When I was small, I was in love,             
>     - 
> - Sysabend   -       In love with everything.                     
>     -
> - CareTaker  -       And now there's only you...                  
>     - 
> --------------         -- Thomas Dolby, "Cloudburst At Shingle 
> Street" -
> 
>