Glossary
Aftertouch
Most modern MIDI keyboards can generate
Aftertouch
messages. If you press down on a key while it
is already playing on such a keyboard, this aftertouch generates MIDI messages. This can be used to
add an expressive volume swell to the sound character (e.g. vibrato).
CD-ROM
Removable ”Read Only Memory” data storage device.
Compact Flash Card
Removable, read- and writable data storage device. Keeps data permanently.
Control Change (Controllers)
Using these MIDI messages it becomes possible to change the sound response of the sound
generator.
This message basically consists of two parts:
• the controller number which determines what is influenced. It can range between 0 and 120,
• the controller value which determines the intensity of the modification.
Examples of the use of controllers are slowly starting vibrato, movement of the sound in panorama
position or influence on the filter frequency.
Effect-Algorithm
A software-based process to generate a certain kind of sound processing. The Memotron Rack offers
the following different effect-algorithms:
– Hall:
Simulation of a big room / environment
– Room:
Simulation of a small room / environment
– Plate:
Simulation of a Plate Reverb
– Chorus:
Type of signal processing. Several slightly detuned copies of a signal are
mixed together, to generate a type of ”choir”-like effect. Adds subtile animation
and density to a sound.
– Flange:
Type of signal processing. A slightly time-delayed copy of a signal is mixed
with the original. Adds animation to a sound.
– Delay:
Echo-effect
– Rotary Speaker:
Type of signal processing, achieved from rotating speakers (Doppler-effect,
Leslie-cabinet). Famous especially for organ-sounds.
Effect-Section
The Memotron Rack’s internal selection of signal processing features.
Drive directory
List of available storage devices respectively memory-drives.
File-System
Hierarchic structure of an electronic storage device, e.g. drives, folders, files.
Frame
In the Memotron keyboard a combination of up to three tracks plus effect- and MIDI-settings.
Low pass filter
A filter that alters a sound by attenuating its high frequencies.
MIDI
MIDI is short for ”Musical Instrument Digital Interface“. It was developed in the early eighties to link
electronic musical instruments of different types and from different manufacturers. Up to that time
Memotron Rack OS v1.1 User Manual
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