Moog Music Little Phatty Stage II - Manual (Page 9)

Page 10
LP Stage II User’s Manual - The Basics
Page 11
LP Stage II User’s Manual - The Components
Now let’s take a look at the individual module components that make up the Little Phatty Synthesizer, start-
ing with the Oscillator section and moving right across the front panel, explaining the features and functions
of the Filter, Envelope Generator and Output sections. Then we’ll cover the Modulation section, the Key-
board and Left-Hand controls, the Input/Output Side Panel, and the User Interface section.
A. The Oscillator Section
The Oscillators are the main sound source of the Little Phatty. The oscillators in the LP are analog Voltage
Controlled Oscillators (VCOs) that feature a temperature regulation circuit that provides them with excel-
lent tuning stability. The LP’s VCOs can produce a total musical range of 9 octaves!
The Components
Oscillator One serves as a master oscillator to which
Oscillator 2 is tuned. The timbres of the oscillators
are adjusted by their variable waveform (Wave)
controls. There is also a switch for syncing Oscillator
2 to Oscillator 1, and a control for adjusting the glide
rate which is explained below.
The frequencies of the oscillators are controlled by a
number of sources. The main source is the keyboard.
The keyboard creates a voltage that allows the
oscillators to be played in an equal tempered scale.
The glide circuit can be switched in between the
Keyboard CV and the oscillators to slow the changes
between notes (portamento). The Keyboard CV
is mixed with the Octave switch CV, the Frequency
control (Oscillator 2), the Pitch Bend Wheel, the
Pitch CV In (on the side panel), the fine tune control,
and the output of the Mod Matrix when the “Pitch”
destination is selected.
Oscillator Section Controls:
Octave:
Each Oscillator has a switch labeled OCTAVE that selects the relative frequency range. To select the octave,
simply press the switch. Each press of the switch advances the setting, as indicated by the corresponding
LED. When the topmost octave is reached, the next button press cycles back to the lowest octave. The
panel markings 16’, 8’, 4’ and 2’ are octave standards based on organ stops. On the 16’ setting the highest A
on the keyboard is A440.
Oscillator Level:
Each oscillator has a switch labeled OSC LEVEL that allows the analog edit control to adjust the oscillator
level. This allows you to control the relative strength of each oscillator in the mixer.