Aphex EXCITER Instruction Manual download pdf (Page 8)

Aphex Systems Ltd. Model 204Page 8

204

instruction Manual

2.1 THE AURAL EXCITER LEGACY

Congratulations, you have just purchased the latest in Aural Exciter technology, combined with the one and

only Big Bottom circuit. Aphex Systems, Ltd. started doing business in 1975 with the introduction of the Aural

Exciter, which has become a standard in the professional audio industry. In the past 26 years, the Aural Exciter

has been used on an innumerable number of albums, CD’s, movies, broadcast productions, commercials and

concerts.

Interestingly enough, the first Aural Exciter was only available on a rental basis for $30.00 per minute! It wasn’t

until 1981, when the Type 2 processor was developed, that recording studios, touring companies and broad-

cast studios were able to purchase it.

The Aural Exciter has come a long way since then, though the basic principles of its operation are the same.

After the Type 2 was well established in the professional realm, a simpler circuit was designed and placed in a

low cost Type B unit in 1983, making the Aural Exciter available to DJ’s and musicians for use in modest P.A.

systems and project studios.

Further refinements and even lower costs were realized with the introduction of the TYPE C in 1985. In 1989

a new professional unit, the TYPE 3, was developed which included all the circuit and control improvements

learned up to that time. In 1992, the TYPE C2, offered yet further improvements on the basic Aural Exciter

circuitry making it quieter, more musical, and easier to set up and use. It also featured the original Big Bottom,

a patented circuit which revolutionizes processing of low frequencies.

Now, the latest in this distinguished line is the Model 204 dual channel Aural Exciter and Optical Big Bottom.

The 204 combines updated and improved circuitry with new attractive styling and full professional features at

a very moderate price. The newly developed Optical Big Bottom circuit surpasses all other bass processors. It

remains simple and easy to use.

Aphex Systems is committed to providing high performance processors to the professional audio industry that

are innovative and beyond the scope of similar products. The Aural Exciter and Big Bottom are patented in the

United States, Japan and most of Europe. Others may claim they are doing the same thing, but they cannot.

They simply have to resort to some form of EQ (amplitude correction or expansion), distortion generating,

phase scrambling and/or filtering. They cannot add or restore detail, nor can they safely increase bass. They can

only increase peak levels causing clipping, feedback, tape distortion and listener fatigue.

2.2 THE AURAL EXCITER AND BIG BOTTOM TECHNOLOGIES EXPLAINED

The AURAL EXCITER is an audio processor that recreates and restores missing harmonics. Harmonics are musi-

cally and dynamically related to the original sound, revealing the fine differences between voices and various

instruments.

Reproduced sound is audibly different than the original live sound because of the loss in harmonic detail, often

sounding dull and lifeless. The Aural Exciter adds harmonics, restoring the sounds natural brightness, clarity

and presence, effectively improving detail and intelligibility. Using the Aural Exciter on specific instruments and/

or in the final mix brings life back to the recording.

The original Aural Exciter patent disclosed a method for generating harmonics which was amplitude depen-

dent. In nature, generally speaking, the higher the amplitude, the higher the amount of harmonics. There

are instances, however, in which there are high level sinusoidal waveforms, which should not have harmonics

added, and other instances which have low level transients, which could be enhanced by additional harmon-

2.0 Introduction

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