User Manual

56 Aftertouch Dave Smith Instruments
Modulation Wheel
The Mod wheel controls the amount of modulation applied to any destina-
tions chosen in the
low-frequency oscillator section. This allows you to
“perform” LFO modulation in real time by moving the Mod wheel. This is a
great way to add expressiveness to a sound or performance.
To choose a modulation destination for the Mod wheel:
1. In the low-frequency oscillator section, choose a modulation desti-
nation as well as a shape and frequency for the LFO. (See “Low
Frequency Oscillators” on page 34 for more details.)
2. To apply modulation only when using the Mod wheel, set the initial
amt knob to zero. (Turning this knob up will apply LFO modulation
continuously — not just when the Mod wheel is used.)
Many programs use the Mod wheel to add vibrato. In this case, vco 1 and vco 2
are enabled as modulation destinations in the low-frequency oscillator section. This
adds vibrato when you push the mod wheel forward. Set the initial amt knob to zero to
apply vibrato only when using the Mod wheel.
Aftertouch
Aftertouch is a performance feature that allows you to add modulation to
a sound by applying additional pressure to a key after the key is already
down. The greater the pressure applied, the more modulation is applied.
The OB-6 provides monophonic (or “channel”) aftertouch, which means
that applying pressure to any key within a chord will apply modulation
to all notes currently held.
The Aftertouch section lets you choose the amount of modulation
applied using aftertouch and which parameters are modulated (oscillator
frequency, lter frequency, etc.). You can set either a positive or negative
amount.
For example, if you select the lter cutoff frequency as destination (
filt
freq), set a positive amount of aftertouch, then press the keys harder, the
lter cutoff frequency will increase, making the lter open wider and the
sound become brighter.