4ms EnvVCA Manuale d'uso - Pagina 10
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Patch: Making an Oscillator and Synth Drums
Cycle on
Switches to Fast.
Sliders set the base
pitch and waveshape
Level controls volume
Rise/Fall CV fully to
the left
To mixer/output amp
Making an Oscillator
In this patch we'll use Channel A of the Dual EnvVCA as an oscillator and Channel B as the modulator
to create a kick drum sound.
To make the oscillator, flip the Rise and Fall switches of Channel A to Fast. Patch the Env Out A jack
to a mixer. Engage the Cycle button to begin oscillation. You can change the pitch by adjusting the
sliders. If both sliders are approximately at the same position, you'll get a triangle wave output. If one is
substantially higher or lower than the other, the output will resemble a ramp or saw wave. For pulse
wave shapes, you can take the signal from the EOR jack instead of Env Out A. In this case, adjusting
the sliders separately will change the pulse width.
Making a Kick Drum
To make a kick drum sound, first use the sliders to set the pitch of Channel A low enough so that you
can't hear sound. Set the sliders to equal positions. Now we will modulate the pitch by patching the Env
Out B jack to Channel A's Time CV jack. Set Channel A's Rise and Fall CV attenuverters to be fully
CCW. Fire triggers into Channel B's Trigger jack to hear the pitch of Channel A modulate. Adjusting the
Level knob on Channel B will change the amount the pitch rises: typically for a classic analog kick
sound the knob should be around 1 or 2 o'clock. The Rise and Fall sliders of Channel B will adjust the
attack and decay. A typical drum will have a sharp attack and slower decay, so start with the Rise slider
and switch at Fast, and the Fall slider and switch in the middle positions.
An exponential modulation curve makes a more extreme kick drum sound. To create this, split the
signal coming out of Env Out B to also go to Channel B Time CV. Adjust Channel B's Fall CV knob to
left of center (try at about 10:00), and keep the Rise CV knob at center. If you adjust Channel B's Level
knob, you also will need to adjust Channel A's Rise and Fall CV knobs to set the amount of pitch
modulation.
Slow
Cycle
Med
Fast
Rise
Fall
Slow
Level
ENV
OUT
Fast
A
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOR
Follow
In
Out
A
OR
VCA CV
Env
Out
Audio A
Dual EnvVCA
Page
Slow
Med
Fast
Rise
Fall
Slow
Level
Fast
B
Rise
Fall
Offset
Time CV
Rise
Fall
Trigger
EOF
Follow
A
In
Out
B
VCA CV
Audio B
10
of
20
Cycle off
Rise switch to Fast.
Fall switch to Med.
Rise and Fall sliders
control attack and
decay of kick drum
Level controls
amount of modulation
From trigger source
(gate sequencer,
clock, manual trigger,
etc.)