Description; Introduction; Unpacking; Optional Accessories - AKG HEARO 999 AUDIOSPHERE User Instructions

Dear Customer:
Thank you for purchasing an AKG product.
In order to make optimum use of the benefits of your HEARO 999 AUDIOSPHERE, please
take a few minutes to read the instructions below carefully before operating the equip-
ment. Please keep the manual for future reference.
If you have any questions beyond the scope of this Manual, visit our website at:
http://www.akg-acoustics.com/english/headphones/hearo999/faqs.htm
Your HEARO 999 AUDIOSPHERE comprises the following components:
1 HEARO 999 AUDIOSPHERE with integrated surround processors and UHF transmitter
2 stereo connecting cables for interfacing your HEARO 999 AUDIOSPHERE with your audio,
video or TV system
1 AC adapter
1 fiber optical cable for connecting your HEARO 999 AUDIOSPHERE to an optical digital out-
put
Check the packaging. If any of the above items is missing, contact your AKG dealer
immediately.
RMU 60 rack mount kit for one or two HEARO 999 AUDIOSPHERE units
The HEARO 999 AUDIOSPHERE Digital Processor is a high quality digital signal processor
whose high resolution ensures optimum sonic results with both analog and digital program
material. Outputs for hardwire stereo headphones and loudspeakers allow the unit to be used
within professional systems.
The HEARO 999 AUDIOSPHERE provides analog and digital inputs for easy interfacing with
analog outputs on audio, video, TV equipment or PCs as well as digital outputs on DVD and
CD players or digital TV sets.
Analog signals are digitized immediately after the input stage. All signal processing that
affects the sound takes place in the digital domain.
The HEARO 999 AUDIOSPHERE is the first device that provides four unique 3-D sound pro-
cessing techniques in one unit:
• IVA Individual Acoustics with 7 selectable ear matching functions for absolutely realistic,
three-dimensional listening through headphones;
• Dolby Pro-Logic decoder for perfect reproduction of hi-fi, TV, PC, or video sound in ana-
log or digital Pro-Logic surround formats;
• Dolby Digital decoder for optimum reproduction of DVD multichannel sound (AC3);
• VMAx for surround sound from a single pair of loudspeakers.
The HEARO 999 AUDIOSPHERE features a 1 U half-rack case with removable feet. The
optional RMU 60 rack mount kit allows you to install one or two units side by side in a 19"
rack.
One drawback of headphone listening is the psychoacoustic phenomenon of "inside local-
ization": the orchestra seems to play inside your head rather than in the room. AKG de-
veloped a binaural audio processing techniquecalled IVA (Individual Virtual Acoustics) that
uses so-called "ear matching functions" to model the way the head and pinnae change the
arriving sound waves. Thus, the various sound sources will seem to be located outside your
head even when you are using headphones.

2 Description

A: Natural hearing: Due to the effect
of the head and pinnae, sound
waves arriving at one ear differ
from those arriving at the other.
Amplitude and phase differences
create a sense of spatial hearing.

2.1 Introduction

Note:

2.2 Unpacking

2.3 Optional
Accessories

2.4 General Description

Professional quality
processor
Universal interfacing
Digital signal processing
IVA Individual Virtual
Acoustics
Dolby Pro-Logic
Dolby Digital
VMAx
Rack mount case
2.5 IVA Individual
Virtual Acoustics