Bedienungsanleitung Yamaha SY35 (Seite 45 von 49) (Englisch)

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LFO

LFO stands for “Low Frequency Oscillator.” This is the oscillator, usually with

a frequency variable from about 0.1 to 20 hertz, that is responsible for creating

the periodic variation in tremolo, vibrato, chorus, phasing, and other modulation

type effects.

MIDI

“MIDI” is an acronym standing for “Musical Instrument Digital Interface.”

MIDI allows musical instruments, sequencers, signal processing devices, com-

puters, and other devices to communicate and control each other via a simple

cable connection. The introduction of MIDI has revolutionized the music field,

making control of the music production process easier and more efficient than

ever before.

Modulation

In synthesizers, the term “modulation” usually means to vary the amplitude or

frequency of a sound in accordance with some other signal. This “other

signal” is most commonly the output from the synthesizer’s LFO (described

above), although in Yamaha FM synthesis (also see above) it can also be the

signal from a modulator operator in an FM algorithm.

Multi

Although normally a prefix, as in “multi-talented,” the term “multi” on its

own has come to refer to multi-timbre setups in the synthesizer world. A multi is

usually a group of 8 or 16 voices that can be played simultaneously either from

the instrument’s keyboard, sometimes in split-keyboard configurations, or via

MIDI. For MIDI control each voice receives on a different MIDI channel

number, allowing multi to be handled as multiple tone generators by the

controlling sequencer or computer. Multis also allow a number of parameters to

be programmed individually for each voice: volume, pitch, effects, etc.

Pan

The word “pan” is derived from the “pan pot” controls found on mixing

consoles, which is in turn derived from “panoramic potentiometer.” A pan

control or parameter determines the position of a specific sound — e.g. an

element of a voice or a drum instrument — within the output stereo sound field.

Panning to the left means that more of the corresponding sound is delivered via

the left channel than the right channel, and vice versa. The listener then hears

the sound at the appropriate position between the stereo speakers or

headphones.

Preset A “preset” can be any unit of data — a voice or multi (see above), for example

— that is pre-programmed by the manufacturer and provided with a

synthesizer. Presets make life easier for beginning synthesizer users as well as

performance-oriented players who simply want to select a sound and play

without having to do any programming of their own. The quality of the presets

included with an instrument is therefore critical to the value of the instrument.

Vector

Mathematically speaking, a “vector” is a physical quantity with both

magnitude and direction. This applies in a similar way to vector synthesis in that

the vector control controls the magnitude and direction of a quantity that can be

pitch or level.

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