4ms EnvVCA Gebruikershandleiding - Pagina 7

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Rise and Fall Time Ranges

Switch Position

Slider

Range

(total env.

time)

Slow

3 min. to

Slow

Med

1.5 sec.

Fast

Slow

20 sec. to

Med

18Hz

Fast

Slow

2.5Hz to

Fast

Med

800Hz

Fast

Because of its analog nature, the maximum and minimum rise and fall times vary from unit to unit. The

table above shows typical values.

Note that the switch positions have little effect on the range obtained by using CV. This is intentional, to

allow external modules control over the full range.

Creating Envelopes (Trigger, Cycle, Follow)

There are four ways to generate an envelope with the EnvVCA: using

the Trigger jack, the Cycle button, the Cycle jack, or the Follow jack.

The Trigger jack starts an envelope when it receives a trigger. It only

responds to rising edges, that is, when the voltage rises through 2V.

Figure 1 shows how a long or short pulse will cause identical

envelopes since the pulse width and falling edge of the signal are

ignored.

Triggering with RETRIG Jumper Off (Factory Default)

If the envelope is already rising when a trigger is received, then the

trigger is ignored (unless the RETRIG jumper is installed). If the

envelope is falling when a trigger is received, it will begin rising from its

current voltage. Figure 2 demonstrates this: the fifth and seventh

triggers occur while the envelope is falling and cause it to begin rising mid-fall. The rest of the triggers

occur while the envelope is rising and are ignored.

Triggering with RETRIG Jumper On

Figure 3 shows how the RETRIG

jumper changes the behavior.

Regardless of what stage the

envelope is in, a trigger always resets

it to zero and begins rising. The sharp

transition to 0V can cause a click

when used with audio, so the jumper

is not installed by default.

Max Range

Use Cases

with CV

(total env.

time)

Gradual, slow fades or modulation changes

~30 min. to

occurring over the course of a long time.

300Hz

Generally suited for typical musical tempos. Useful

~30 min. to

for making notes, from snappy percussive sounds to

1kHz

long decays. The slower slider settings approach

LFO ranges.

Good for FM, AM or other audio-rate modulation.

~30 min. to

Snappy attacks and sharp decays.

8kHz

Figure 2: RETRIG jumper off.

Triggers on rise stage have no

effect. Triggers on fall stage switch

to rising.

Page

Figure 1: Trigger jack pulse width

does not change Env output.

Figure 3: RETRIG jumper installed.

Triggers always restart the envelope.