Modulation - E-Mu MORPHEUS Operation Manual

PRESET PROGRAMMING
Morpheus has an extensive modulation implementation using two
multi-wave LFO's (Low Frequency Oscillators), three envelope genera-
tors, two multi-segment function generators and the ability to respond
to multiple MIDI controllers. You can simultaneously route any com-
bination of these control sources to multiple destinations.

MODULATION

Modulation means to dynamically change a parameter, whether it be
the volume (amplitude modulation), the pitch (frequency modula-
tion), or whatever. Turning the volume control on your home stereo
rapidly back and forth would be an example of amplitude modulation.
To modulate something we need a modulation source and a modula-
tion destination. The source is your hand turning the knob, and the
destination is the volume control. If we had a device that would
automatically turn the volume control, we would also call that device
a modulation source.
Morpheus is designed so that for each of the variable parameters, such
as the volume, there is an initial setting which can be changed by a
modulation source. Therefore in the case of volume, we have an initial
volume and we can change or modulate that volume with a modula-
tion source. Positive modulation Adds to the initial amount. Negative
modulation Subtracts from the initial amount.
The main modulation sources on Morpheus are Envelope Generators,
Function Generators and Low Frequency Oscillators. In the example
above, an envelope generator could be routed to automatically turn
the volume control as programmed by the envelope. Or, a low fre-
quency oscillator could be routed to automatically turn the volume
control up and down in a repeating fashion.
Turning the volume control back and forth on your home stereo is an example of
Amplitude Modulation.
70 Morpheus Operation Manual