Visual Aurals, PO Box 4898, Arcata CA 95521.   (707) 822 4800

             Welcome to the world of living sound. 

Congratulations for being one of the lucky ones who has received
the Visual Aural Music Analysis System.   

Visual Aurals' plan is to create the ultimate programmable music
to visuals converter. The Amiga system is the one of a series of
hardware and software products which will move toward that goal.
This version lets the user create interactive sound responsive videos 
which have no limit barring the computer screen. That barrier may be
broken soon. The Visual Aurals work real nice on a composite video
monitor and on wide screen. 

The Visual Aural Music Analyzer module makes the process possible.
Analog information enters the module through a built-in microphone
or directly through two RCA phono connections. The data is pro-
cessed into nine different channels, all of which can be read by
the Amiga. These channels make it possible to make quick spectral
and intensity measurements of the inputs.

Five potentiometers and one switch give the analyzer a very wide
dynamic range of operation making it very flexible. For example,
the RCA connections which are normally used for line level inputs can 
also be used to read two separate external microphones. Each input
channel has its own separate gain control. Separate controls are
used to control the bass and treble graphics speed. A switch plus 
a jumper will allow the board to function as a standard A/D
converter board.

Visual Aurals I is the first of a series of software packages which
makes use of the amazing Music Analyzer hardware. Future software
will apply the product to home entertainment, music, video, medical,
advertising, engineering, education, and manufacturing.

Visual Aurals, SCOPE, and , ANALYZE  are the programs that allow
you to use the Music Analyzer.  

Use the SCOPE program to observe the incoming data similar to
that of an oscilloscope. The SCOPE displays the contents of the
eight intensity channels. Please see the scope section of the
manual for more details.

ANALYZE is a program which determines the instantaneous frequency
of the input over a range of 7 octaves. It can be used for tuning
instruments or as a frequency counter. 

Many of the programs on Visual Aurals I are part of an assortment
of the first visual music impressions that work on the AMIGA.
These do not even approach the number of possible ways of
displaying music. Some real surprising graphics have appeared.
Since each letter key automatically activates its corresponding
mode and special keys cause mode variation, color change, and
object change, without interupting the ongoing display, live
interactive video creation becomes very easy. 

The Music Analyzer  hardware is actually an economical piece
of test equipment that provides a very convenient way to create
real time graphics and other intelligent controls from the
incoming data. The system is designed, not only to capture data,
but also to perform real time analysis while the data is being
accessed. The hardware works so well that we plan to use the 
existing circuit for new applications.