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Meet the SJ-2’s envelopes

The SJ-2 has two ADSR type envelopes, which can be scaled by velocity and key-tracking

Envelopes are triggered when a key is depressed; from this point the output of the envelope (used for

modulation) will develop over time in a predictable profile, defined by the user, using controls in the

envelope section. The configuration of these controls varies from one instrument to another, but a

popular standard which emerged early on is to have four controls - Attack, Decay, Sustain & Release.

The following graph shows how these four controls operate on the envelopes output:

ATTACK

DECAY

RELEASE

SUSTAIN

OUTPUT

TIME

holds this level

indefinitely,

until key is released

13 Programming -Envelopes

Key is released

Key is pressed

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 29 30

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Manx Destubt V2 Guia do Utilizador Página 14