Yamaha MOTIF6, MOTIF7, MOTIF8, Music Production Synthesizer ■Amplitude, • Band Pass Filter, • Band Elimination Filter, ■LFO (Low Frequency Oscillator), ●FEG (Filter Envelope Generator)

• Band Pass Filter

This only passes a band of signals around the Cutoff frequency. The width of this band can be varied.

Level
Cutoff range	Range passed	Cutoff range

Center frequency Frequency

• Band Elimination Filter

This attenuates a band of signals around the Cutoff frequency, but passes everything else.

Level

Rangepassed Cutoff range Rangepassed

Center frequency Frequency

●FEG (Filter Envelope Generator)

Using the FEG, you can control the transition in tone from the moment a note is pressed on the keyboard to the point at which it is released. As illustrated at right, the Filter Envelope consists of five Time (transition speed) parameters and five Level parameters (for the amount of filtering). When you press a note on the keyboard, the cutoff frequency will change according to these envelope settings. This is useful for creating automatic wah effects, for example. Furthermore, different FEG parameters can be set for each Element.

	Attack	Decay1	Sustain	Key off	Release
Level	Level	Level	Level		Level

Hold Level

0				Time
Hold	Attack	Decay1	Decay2	Release
Time	Time	Time	Time	Time

■Amplitude

Reference (page 145)

This unit controls the output level (amplitude) of each Element output from Filter. The signals are then sent at this level to the Effect block. Also, by setting the AEG (Amplitude Envelope Generator), you can control how the volume changes over time.

Main functions

●AEG (Amplitude Envelope Generator) Using the AEG, you can control the transition in volume from the moment a note is pressed on the keyboard to the point at which it is released. As illustrated at right, the Amplitude Envelope consists of five Time (transition speed) parameters and five Level parameters (for the amount of filtering). When you press a note on the keyboard, the volume will change according to these envelope settings. Furthermore, different AEG parameters can be set for each Element.

Level	Attack	Decay1	Sustain	Key off	Release
	Level	Level	Level		Level

Init					Structure
Level
0				Time	Basic
Attack	Decay1	Decay2	Release
Time	Time	Time	Time

■LFO (Low Frequency Oscillator)

Reference (page 147)

As its name suggests, the LFO creates waveforms of a low frequency.

These waveforms can be used to vary the pitch, filter or amplitude of each Element to create effects such as vibrato, wah and tremolo. LFO can be set independently for each Element; it can also be set globally for all Elements.

MOTIF Basic Structure 47