Section 9 — Program Parameters TS-12 Musician’s Manual
4
ENV1, ENV2, ENV3 — TS-12 Envelopes
An Envelope is a shape, or contour, which we apply to a signal source to make it change over
time. Each TS-12 voice has three envelopes. These envelopes are automatically routed to the
pitch, filter frequency and amplitude of the voice, though ENV1 and ENV2 can also be assigned
elsewhere, wherever a modulator is selectable.
• ENV1 is routed to the pitch of the voice. There is a parameter always available on the Pitch
Mods page which lets you adjust the amount by which ENV1 will modulate the voice’s pitch.
• ENV2 is routed to the filter cutoff frequency of the voice. For each of the voice’s two filters, the
ENV2 parameter on the Filters page controls the ENV2 depth.
• ENV3 is routed to the amplitude (volume) of the voice. ENV3 always controls the final volume
contour of the voice. Any other volume modulators selected on the Output page will occur
before ENV3 in the signal flow.
The TS-12 envelopes are descended from the venerable ADSR (attack, decay, sustain, release)
envelope, but with many refinements. While the ADSR envelope gives you control over three
time segments and one level, the TS-12 envelopes give you control over four levels and five time
segments.
The illustration below shows the make-up of a TS-12 envelope:
99
0
KEY HELD RELEASE
ATTACK DECAY 1 DECAY 2 DECAY 3
PEAK
BREAK 1
BREAK 2
SUSTAIN
KEY DOWN
TIME
KEY UP
Each envelope page consists of three sub-pages, which are reached by repeatedly pressing the
Env 1, Env 2, or Env 3 button. For each envelope page:
• The first sub-page contains the five time segments: ATTACK, DECAY1, DECAY2, DECAY3
and RELEASE.
• The second sub-page contains the four levels: PEAK, BREAK1, BREAK2, SUSTAIN; this sub-
page also contains the VEL-LEV velocity-to-levels modulation amount.
• The third sub-page contains the Envelope mode, keyboard scaling, and several parameters for
shaping the velocity response of the envelope.
ENV1, ENV2 and ENV3 Pages
The ENV1, ENV2 and ENV3 Pages, parameters and ranges are all the same except where
indicated below. We will use ENV3 as our example, since its effect on the volume of the voice is
immediately apparent.
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