Moog Little Phatty User Manual
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Moog Little Phatty User Manual

Analog synthesizer bob moog tribute edition
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FORWARD from Mike Adams ..................................
THE BASICS
How to use this Manual .......................................
Setup and Connections ........................................
Overview and Features ........................................
Signal Flow ....................................................................
Basic Operation .........................................................
A. Oscillator Section ................................................
B. Filter Section ...........................................................
C. Envelope Generators Section .....................
D. Modulation Section ...........................................
E. Output Section .....................................................
F. Keyboard & LH Controllers ...........................
G. Input/Output Panel ............................................
H. Interface Panel ......................................................
Bob Moog Tribute Edition
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THE USER INTERFACE
Preset Mode ..........................................................................
Master Mode .........................................................................
A. Menus ........................................................................
B. System Utilities .....................................................
C. System Exclusive .................................................
Receiving SysEx Data ........................................................
Performance Sets ................................................................
How the LP handles MIDI .............................................
APPENDICES
A - Tutorial .............................................................................
B - MIDI Implementation ..............................................
C - Service & Support Information ........................
D - Caring for the Little Phattty ...............................
F - Specifi cations ................................................................
GLOSSARY ......................................................................................
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Page 3

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Summary of Contents for Moog Little Phatty

  • Page 1: Table Of Contents

    E. Output Section ............. D – Caring for the Little Phattty ....... F. Keyboard & LH Controllers ......E – Using the CP-251 with the Little Phatty ..G. Input/Output Panel ..........F – Specifi cations ..............H. Interface Panel ............

  • Page 2: Forward From Mike Adams

    - simply playing. Hopefully this is the case. The Little Phatty is built with care and pride by our team in Asheville, N.C. If you have a chance to come to the beautiful mountains of Western North Carolina, call and come by and see us. We would be happy to take you on a tour of the factory.

  • Page 3: How To Use This Manual

    LP User’s Manual - The Basics How to Use this Manual The Setup and Connections section below explains how to unpack, setup and connect the Little Phatty, and provides a quick start to get you up and running with your new synthesizer.
  • Page 4 22 lb. analog synthesizer and will not topple if you play hard. Use caution when lifting the Little Phatty out of the carton, and be sure to save the carton and all packing material in case you need to ship the Little Phatty for any reason.

  • Page 5: Overview And Features

    LP User’s Manual - The Basics Overview and Features The Little Phatty (LP for short) is a monophonic analog synthesizer that is a descendant of the classic Minimoog Model D. The LP features 2 ultra-stable oscillators, a genuine Moog 24dB/octave low pass filter, two 4-stage analog envelope generators and a flexible modulation matrix.
  • Page 6 2. Audio jacks – provides monophonic audio input and audio output connections. The Audio Input jack allows external signals to be processed by the Little Phatty. 3. Control Voltage jacks – provides control voltage/Expression Pedal inputs for Pitch, Filter, and Volum parameters, and a keyboard gate input to trigger the envelope generators with a footswitch or gate signal.

  • Page 7: Signal Flow

    Signal Flow To understand the operation of the Little Phatty, take a look at the diagram below. The diagram shows the flow of the audio, control voltage and modulation signals in the Little Phatty. Heavy lines are used to indicate audio signals, which flow from left to right.

  • Page 8: Basic Operation

    This is called RAC™ (Real Analog Control). Of course the Little Phatty is an analog synth, but the addition of RAC gives the LP a responsiveness that can only be achieved with analog control.

  • Page 9: The Components

    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.
  • Page 10 LP User’s Manual - The Components Waveform: Each oscillator has a switch labeled WAVE that allows the analog edit control to modify the waveform. The waveform is continuously variable from triangle, to sawtooth, to square, to rectangular. The waveform is morphed gradually from one to another as the value control is rotated. The legend around the analog edit control for the oscillator section indicates the knob positions to obtain the triangle, sawtooth, square and skinniest pulse waveforms.

  • Page 11: Filter Section

    An 18dB/octave slope is steeper still, with a corresponding frequency rejection. Finally, a 24 dB/octave slope provides the steepest rejection of frequencies above the cutoff point. The classic Moog filter is a 24dB/ octave lowpass filter. The Moog filter also features a parameter called Resonance. This parameter adds a resonant peak at the cutoff frequency.
  • Page 12 LP User’s Manual - The Components Finally, the OVERLOAD parameter allows you to set the amount of signal clipping from none to soft to hard clipping as the amount is increased. The results you get with OVERLOAD will depend on the set- tings of the oscillator waves and levels, and the filter cutoff and the filter resonance settings in addition to Overload amount.

  • Page 13: Envelope Generators Section

    When the key is released, the Release control deter- mines how long it takes for the sound to fade out. The Little Phatty has one EG dedicated to the filter (to control the cutoff frequency), and one EG dedicated to the amplifier (to control the volume).
  • Page 14 The KB GATE jack on the side panel is a trigger input that accepts a footswitch (momentary, normally closed like the Moog FS-1) or a gate signal. Pressing the footswitch or applying a gate signal (+5V) causes both envelopes (Volume and Filter) to trigger.

  • Page 15: Modulation Section

    LP User’s Manual - The Components D – The Modulation Section Modulation is the heart of making interesting sounds with analog subtractive synthesis. The LP’s Modulation section opens up a world of modulation possibili- ties that were not available on the original Minimoog. The Modulation section allows you to select from six modulation sources, four destinations, and set the modulation amount.

  • Page 16: Output Section

    The jack ac- cepts a positive control voltage from 0 to 5 Volts, or an expression pedal like the Moog EP-1. A voltage of 0 silences the LP, and a voltage of 5 volts corresponds to the output level set by the Volume control.

  • Page 17: Keyboard & Lh Controllers

    LP User’s Manual - The Components F – Keyboard and Left-Hand Controllers The Little Phatty has a 37-note keyboard (3 octaves, C to C). When combined with the OCTAVE buttons, the keyboard has a playable range of 7 octaves. The key- board produces velocity control voltages, and transmits MIDI Note On and Note Off messages polyphonically.

  • Page 18: Input/Output Panel

    EP-1 (ring = +5.5 supply to the pedal, tip = variable CV return), or a control voltage from –5 to +5 Volts. The KB Gate Input accepts a footswitch (a momentary, normally-closed footswitch like the Moog FS-1) or a +5 Volt Gate Signal. Page 20...

  • Page 19: Interface Panel

    Pressing the MASTER switch places you in Master mode. In this mode, the VALUE knob is used to scroll through the Master mode menus for the Little Phatty. For a list of the Master mode menus, refer to page 25.
  • Page 20 LP User’s Manual - The Components Fine Tune: The FINE TUNE control is used to tune the Little Phatty’s oscillators + /– 3 semitones for matching an external reference pitch. Glide On/Off: The GLIDE ON/OFF switch enables or disables the glissando effect between notes. Glide is ON when the switch LED is lit.

  • Page 21: Preset Mode

    LP User’s Manual - The User Interface Preset Mode Preset mode is the default mode when the LP is powered on. Preset Mode is used to access presets and provide control for editing, naming and storing sounds. Preset sounds are selected using the VALUE knob. As the VALUE knob is advanced, the next preset appears in the display and is immediately available to be auditioned (you do not need to ‘activate’...
  • Page 22 LP User’s Manual - The User Interface When you press STORE, the LCD will display the ‘PRESET STORED’ message. Changing A Preset Name Changing a preset name is simple. Characters in a name are individually selected by moving the cursor to the desired location and scrolling through the character list.

  • Page 23: Master Mode

    LP User’s Manual - The User Interface Master Mode Master mode accesses the global settings for the Little Phatty and the routines for sending and receiving data. To enter master mode, press the MASTER button. By default, the first master menu entry is Performance Sets.
  • Page 24 LP User’s Manual - The User Interface EGR RELEASE/FILTER POLES: This dual-function menu allows you to turn the EGR Release param- eter ON and OFF, and select the number of filter poles. EGR Release is used to enable/disable the Release segment of both the filter and volume envelopes.
  • Page 25 LP User’s Manual - The User Interface PITCH BEND AMOUNT: Pitch Bend Amount allows you to set the global pitch bend range for the Pitch Wheel. The setting applies to both pitch up and pitch down values, and is specified in semitones. To change the range, use the CURSOR button to highlight the parameter, then use the VALUE knob to select the new parameter value.
  • Page 26 LP User’s Manual - The User Interface SYSEX MENU: SYSEX (System Exclusive) is a set of commands to transmit and receive selected presets, bulk dumps and firmware dumps. For more informa- tion, see the SYSEX menu section below. SYSTEM UTILITIES: System Utilities is a set of commands to issue an ‘ALL NOTES OFF’...

  • Page 27: System Utilities

    LP User’s Manual - The User Interface B. System Utilities menus System Utilities provides a set of useful commands, including a command to send an “All Notes Off’ mes- sage, a command to perform an operating system reboot, and a command to restore factory default values and presets.

  • Page 28: System Exclusive

    LP User’s Manual - The User Interface C. SYSEX (System Exclusive) menus SysEx menus are a set of commands to transmit and receive selected presets, bulk dumps and firmware dumps. To enable SysEx menus, press the CURSOR button. This will highlight the menu options shown on the second line of the display.

  • Page 29: Receiving Sysex Data

    The LP is able to receive System Exclusive data at any time without any special prior setup. SysEx files are recognized and received automatically when a SysEx data transfer is initiated. The Little Phatty’s LCD screen will display the status of SysEx data transfers as follows: SINGLE PRESETS: The LP will briefly display a ‘RECEIVING SINGLE PRESET’...

  • Page 30: Performance Sets

    LP User’s Manual - The User Interface Performance Sets Performance Sets is a feature that allows you to customize the order of LP presets for a live performance situation or to enhance your productivity in a studio environment. Performance Sets are based on the idea that during a performance, you may need to switch between a se- quence of sounds that doesn’t necessarily match up to the preset locations.
  • Page 31 LP User’s Manual - The User Interface Editing Performance Sets To edit a Performance Set, use the CURSOR key to select the Performance SET number (1-4), ENTRY lo- cation (1-8) and PRESET (00-99). For example, to select the SET number, press the CURSOR button once to highlight the SET number for editing.

  • Page 32: How The Lp Handles Midi

    LP User’s Manual - The User Interface How the LP handles MIDI When you adjust any one of the LP’s four analog edit controls, MIDI Continuous Controller (CC) messages are transmitted on the MIDI Out jack. The information contained in these messages varies according to the parameter each edit control is assigned.

  • Page 33: A - Tutorial

    LP User’s Manual - Appendices Appendix A - Tutorial For those who are new to the world of electronic music, let’s take a few moments to go through the basics of sound and synthesis. Sound is simply the audible change in air pressure. When we perceive sound, our ears are responding to variations in air pressure that hap- pen to occur in our range of hearing.
  • Page 34 LP User’s Manual - Appendices The Oscillator is the starting point of Subtractive Synthesis, for it is here that the initial sound is created. The oscillator creates electrical vibrations which function in a manner similar to the strings of a guitar; they create the signal source that the rest of the system will use to modify and shape the sound.
  • Page 35 The combined sound sources are routed to the Filter, the circuit that removes frequencies. Although there are several types of filters, the Little Phatty offers just one, but it’s a very important one: the Lowpass filter. By definition, a Lowpass filter removes high frequencies while allow- ing low frequencies to pass through.
  • Page 36 LP User’s Manual - Appendices Included in the list of auxiliary components is the Keyboard, a standard musical instrument ‘interface’. The keyboard produces a control voltage and trigger signal when a key is pressed. The level of the control voltage is a function of which key is pressed.
  • Page 37 Keep in mind that most ‘subtractive’ synthesizers often include more than one of each component. This is especially true of the oscillators and envelope generators (the Little Phatty has two of each), but may also be true of filters, amplifiers and LFO’s. For example, the Moog Voyager has three oscillators, two filters, two amplifiers, an LFO, two extensive modulation sections, and the Voyager’s third oscillator can act as an...

  • Page 38: B - Midi Implementation

    LP User’s Manual - Appendices Appendix B - MIDI Implementation Chart Moog Music MIDI Implementation Chart Date: 6/23/06 Little Phatty Analog Synthesizer Version 1.0 FUNCTION TRANSMITTED RECOGNIZED REMARKS Basic channel Default Changed 1-16, OFF 1-16, OFF User selectable Mode Default...

  • Page 39: C - Service & Support Information

    Music before returning any product. You can request an RMA number on-line using the ‘Product Register’ link on the Moog Music home page or call us at (828) 251-0090. The Little Phatty must be returned in the origi- nal inner packing including the foam inserts. The warranty will not be honored if the product is not properly packed.

  • Page 40: E - Using The Cp-251 With The Little Phatty

    Attenuators to have two separately controllable modulation sources for the LP. Pitch Transposition: Using an Expression Pedal (like the Moog EP-1), you can program the CP-251 to transpose the LP’s pitch to any interval desired and have it ready any time you need it. Here’s the connection: - Connect the EP-1 to an Attenuator Input.
  • Page 41 We’ve just scratched the Surface These are just a few of the synthesis possibilities afforded by the Little Phatty and the CP-251. Other CV equipment like our Moogerfooger® analog effects can be added to expand the sonic potential of the Little Phatty.

  • Page 42: F - Specifi Cations

    LP User’s Manual - Appendices Appendix F - Specifications Type: Performance Controls: Programmable monophonic analog Pitch Wheel: programmable, up to synthesizer w/100 presets +/- 12 semitones Modulation Wheel: 0 to 100% Synth Engine: Fine Tune: +/- 3 semitones Oscillator Section: Glide ON/OFF Oscillator 1: Octave UP/DOWN: +/- 2 octaves...

  • Page 43: Glossary

    LP User’s Manual - Glossary Glossary Here are a few key terms that cover the basics of sound generation as used in the Little Phatty synthesizer. Amplitude – The strength of a sound’s vibration measured in Decibels (dB). Amplitude corresponds to the musical term Loudness.
  • Page 44 Their waveforms look chaotic. White noise is an inharmonic sound that contains equal amounts of all frequencies. Little Phatty – A monophonic analog synthesizer designed by Bob Moog that is a descendant of the classic Minimoog.
  • Page 45 VCF – Short for Voltage Controlled Filter, a VCF is a filter circuit where the filter cutoff frequency is a function of the control voltage. A VCF is used to control the timbre of a sound. In the Little Phatty, the VCF is paired with the Filter ADSR envelope generator for dynamic control.
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