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From: rich@eddie.MIT.EDU (Richard Caloggero)
Newsgroups: comp.sys.amiga,comp.sys.mac,comp.sys.atari.st,rec.music.makers,rec.music.synth
Subject: Sonic Holography.
Message-ID: <7536@eddie.MIT.EDU>
Date: Mon, 30-Nov-87 15:42:29 EST
Article-I.D.: eddie.7536
Posted: Mon Nov 30 15:42:29 1987
Date-Received: Thu, 3-Dec-87 05:30:39 EST
Organization: MIT EE/CS Computer Facility, Cambridge, MA
Lines: 54
Xref: mnetor comp.sys.amiga:11730 comp.sys.mac:10436 comp.sys.atari.st:6550 rec.music.makers:1147 rec.music.synth:2035




**** All replies to this message should be sent to
     rich@eddie.mit.edu; I do n_t read these newsgroups.  I will
     summarize and post any info I receive back to the net!


----------


     I am a musician/hacker with an interest in sonic imaging (sonic
holography).  I am familiar with the Carver sonic hologram generator
and the basic principle used by the device.  However, I recently became
aware of some experimental techniques in this area that are based, so
I've been told, on some of same principles used in modern
radarequiptment (E.G. for beam steering).  Unfortunately, I forget the
jargon term used to describe the process, but its something like "phase
encoding ... :-)." Does anyone out there have any info on this?

     In order to experiment with sonic holography, I would like to
     obtain a computer which is suitable for real-time audio
processing. I'm sorta familiar with the Amiga, and less so with the
Mac.  The Amiga, as I understand, has a special]purpose chip used
exclusively for audio signal processing, as well as A/D and D/A
hardware in the basic system box.  Whatyis the speed and resolution of
the hardware?  I was under the impression hhat the sample size is only
8 bits (poor resolution if ya ask me).  What is thM?hhardware on the
Mac like?

      As I see it, my choice of what system to buy is based on the
      following.  First, I need a fast processor (at least 1 mip +), I
would estimate at least 1 meg of ram (more is always better), and an
environment flexable enough to facilitate large-scale program
developement (E.G. UNIX or equivalent).  Secondly, I am blind, so I
don't want hardware/software hooked to a grmphical user interface
(gimme a good old command-lin5-interpreter like CSH and I'll be
happy).  From what I understand, graphical user interfaces are an
integral part of todays music type software (samplers, sequencers
etc.), as well as machines/os's like the Mac and Amiga.  Does anyone
know to what extent this is true, and how I might avoid this trap?

     Thanx for your help.  Any information/comments will be most
apriciated.  Please send all replies to me, however, for I don't read
these Newsgroups!!!




-- 
						-- Rich (rich@eddie.mit.edu).
	The circle is open, but unbroken.
	Merry meet, merry part,
	and merry meet again.