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			 Sonic Holography(TM) Demo
		Copyright (c) 1994, 1995 Q Studios Corporation
	  Contact: Peter Freese, CIS:74170,543, pfreese@qstudios.com
			    Last updated: 95/11/10
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Sonic Holography (SH) is a new system designed by Q Studios to synthesis 3
dimensional sound placement using stereo channels.  Unlike other systems, Sonic
Holography is highly effective when experienced through headphones, but also
works well with a conventional pair of speakers mounted to the left and right
of the monitor.  For optimal 3D effect, the listener should be equidistant
between the two speakers.

In order for the SH demo to function, you will need a stereo sound card.
Playing the SH demo through a mono sound card is not recommended.  This demo
uses the Apogee Sound System (ASS) for low level hardware access.  It is
possible that the drivers may not work on all sound cards.  I have only tested
it with several SB16 cards.

The first time you run SHPLAY, you will need to configure your sound card.  The
program will remember your settings from then on.  To reconfigure the program,
run it with /SETUP as a parameter.  Once you select the sound card type, you
will see a top down view of the listener, and the sound source will appear as a
flashing cursor which can be controlled with the mouse.  Pressing any of keys 1
through 0 or space bar will play a samples at the current location of the
cursor.  If you hold down a mouse button when starting a sample, the sample
will "track" with the cursor, so if you move the source by the listeners head,
you should hear a proper doppler effect.

You can pass a RAW sample file as a parameter to SHPLAY.  To play this sample,
press the space bar.  All samples should be raw 11KHz mono data.  You can
define up to 10 different samples to be assigned to the "1" through "0" keys.
These are defined by adding the appropriate lines to [Sounds] section of the
SHPLAY.INI file.

For example, to assign the sample SWITCH.RAW to the 1 key and the sample
SWITCH5.RAW to the 2 key, the [Sounds] section of SHPLAY.INI should look like
this:

	[Sounds]
	1=switch.raw
	2=switch5.raw

The 0 key is considered to be sample 10, so it is assigned with the line
"10=SAMPLE.RAW".

SH uses two techniques to achieve 3-D source placement: intra-aural phase
difference (IAPD), and intra-aural level (IALD).  By far, the most important of
these two is phase difference.  The IAPD is fixed at 6 ms.  Level difference
also contributes to the 3d effect, although not as significantly as phase
difference.  You can tune the level difference by modifying the pinna angle and
focal saturation.  Two gray curves represent a uniform level distance for each
pinna (the sound will be at the same volume at any point along the curve), and
a yellow curve represents the sum uniform level distance.

Keys while running the demo:

	ESC	Exit the demo
	1..0	Play one of the samples defined in SHPLAY.INI
	Space	Play the sample passed on the command line
	-/+	Decrease/Increase volume
	[/]	Change pinna angle (IALD)
	</>	Change focal saturation (IALD)
	K	Kill sounds
	S	Toggle Sonic Holography mode

Many program use conventional stereo panning to simulate the placement of
sounds in a 3D environment.  You can put SHPLAY in this mode by pressing the S
key.  Pressing the S key again will reenable Sonic Holography.

