Using the internal sound generator

Envelope

The sound of a musical instrument changes over time from the

 

 

 

 

 

 

 

 

 

 

moment the note begins until it ends. Such change can be expressed

 

 

 

 

 

 

 

 

 

 

by the graph shown below. The shape of this change is distinctive of

 

 

Low pass filter characteristics

that particular instrument, and is an important factor that allows us

 

Level

 

 

 

 

 

 

 

 

to recognize the type of instrument. This shape is called the

 

 

 

 

 

 

 

 

 

 

 

 

“envelope.”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frequenc

 

 

 

 

 

 

 

Cutoff frequency

The envelope of a musical instrument sound will

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A: Attack time

 

change depending on how the instrument is played. For

 

 

 

 

 

 

 

Cutoff frequency

 

 

 

D: Decay time

 

example, when a trumpet is blown strongly, the sound

 

 

 

 

 

 

R: Release time

 

 

 

 

 

 

 

 

 

 

 

 

 

will have a sharp and rapid attack, but when blown

 

 

 

 

 

Envelope

 

 

Sound ends

 

 

 

 

 

 

 

 

gently, the attack will be softer.

 

Filter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To adjust the sharpness of the attack, you can edit the

 

 

 

 

 

 

 

 

 

 

Attack Time of the envelope. By adjusting the envelope

 

 

 

 

 

 

 

 

 

 

Time

 

parameters in this way, you can express a wide variety

 

 

 

 

 

 

 

 

 

 

 

Level

 

A

D

 

 

 

R

 

 

 

 

 

 

 

 

of the characteristics of an instrument.

 

 

 

Note On

 

 

Note Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The shape of the envelope that you specify in this way

 

 

 

 

 

 

 

 

 

 

 

 

will also affect the movement of the cutoff frequency.

 

 

 

 

 

 

 

 

 

 

 

 

If the cutoff frequency is lowered, it will rise as the envelope rises and fall as the envelope falls.

Release Time (TVF&TVA Release) [cc#72]

-64–0–+63

 

 

 

 

 

 

 

 

 

 

 

 

This adjusts the time from when you release the key (note-off message) until the sound decays to silence. The cutoff frequency will also fall accordingly.

Attack Time (TVF&TVA Attack) [cc#73]

-64–0–+63

This adjusts the sharpness with which the note begins.

Decay Time (TVF&TVA Decay) [cc#75]

-64–0–+63

This adjusts the time from when the attack has been completed until the sustain level is reached (figure 1).

*For some sounds, the sustain level is 0 (figure 2). For example, this is the case for piano or guitar-type sounds.

*For some sounds, adjusting the various envelope times may not make any audible difference.

figure 1

Volume

Sounds ends

 

 

 

 

Sustain Level

 

 

 

 

 

 

 

 

 

Time

 

 

 

 

 

 

 

 

 

A

D

 

 

R

Note On

 

 

Note Off

figure 2

Volume

 

 

 

 

A: Attack time

 

 

 

 

 

 

 

 

D: Deacy time

 

 

Sounds ends

R: Release time

 

 

 

 

 

 

 

 

 

 

Time

 

 

 

 

 

 

 

 

 

 

 

 

 

A

D

 

 

Note On

 

 

Note Off

 

 

internal the Using generator sound

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