Fostex VF160EX - Manual (Page 56)

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* A. S. P. (Fostex Advanced Signal Processing Technology)
The A. S. P. is an exclusive new digital effect processing technology designed by
Fostex. This method extracts maximum efficiency from the limited DSP power.
It achieves an overwhelmingly high density Early Reflection sound and wonder-
fully smooth High Dump response through the H. F. A. (Harmonic Feedback Algo-
rithm). Also, it carries out an elaborate reverb simulation with clear sounds through
the H. D. L. P. (Hi-Density Logarithmic Processing), which eliminates the mutual
interference between the numerous integrated delay modules and reduce the
impurity and girt of the sound.
* H. F. A. (Harmonic Feedback Algorithm)
There is one of indispensable elements in the natural echo called “Early Reflection Sound,” which is
usually sacrificed in commercial reverb products in order to reduce costs. (In practice, the Early Reflec-
tion Sound means the very first reverberated sound that bounces back from walls, floors and ceilings of
concert halls). The entire reverb sound quality depends on this Early Reflection Sound and how closely
it can resemble the real echo. The H. F. A. is an algorithm that enables the effect unit to reproduce a clear
and natural Early Reflection Sound by applying an ideal harmonic feedback to each delay module.
* H. D. L. P. (Hi-Density Logarithmic Processing)
The reverb sounds consist of lots of small delay elements combined in a complex way, which are pro-
duced by many delay modules inside the effect unit. In order to obtain smooth and comfortable reverb
sounds, it is very important to efficiently organize the relationship between each delay module and
minimize negative mutual interference. The H. D. L. P. is a technology which applies efficient logarith-
mic processing to each delay module, so that they can work in the most efficient way in order to elimi-
nate harmful reverb elements and roughness. This makes it possible to establish high density and
transparent sounds.
Before the operation, we will briefly discuss the effect functions here such as Reverb, Delay, Chorus, and Flanger,
which are integrated in the VF160EX.
The so called Reverb effect consists of various reflec-
tion sounds mixed together. For example, when you
clap your hands in a tunnel, you will hear the sound
linger even after you stop clapping your hands. This
is the Reverb.
The sounds we normally hear in daily life have three
types of sounds mixed together, i.e., “Direct sound,”
“Early Reflection sound” and “Late Reflection sound.”
The Direct sound means the sound directly reaches
the ears from the sound source. The Early Reflection
sound means the sound that comes after the Direct
sound and has rebound off the wall of the tunnel up
to a few times. The Late Reflection sound means that
the sound rebounds many times long after the Direct
sound has disappeared. Our ears normally hear the
“Direct sound” - “Early Reflection sound” - “Late Re-
flection sound” in the order.
The VF160EX offers high quality ambient effects by employing the A. S. P. (Fostex Advanced Signal Processing
Technology), which is exclusively developed by Fostex. With the A. S. P., you can obtain an incomparably clean
and high density Hall Reverb, overwhelmingly clear Room Reverb and wonderfully hi-fidelity Plate Reverb. In
addition to these typical Reverbs, the VF160EX provides not only various practical algorithms such as Delay,
Chorus, Flanger and Pitch Bend, but some combinations of these are also available, e.g., Delay+Reverb.
The Flanger is one of applications of the Delay.
This is used to create a sound like a jet airplane as-
cending or descending.
This makes the one original sound appear to have
many sources. The Chorus is used to widen or thicken
the original sound.
This is the effect to added a delayed sound to the
original sound. You can obtain a richer sound or com-
pletely change the original source sound by using the
Delay.
Reverb Delay
Chorus
Flanger
Effect Edit Mode