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Moog Moogerfooger MF-102 User Manual
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Moog Moogerfooger MF-102 User Manual

Mf-102 ring modulator moogerfooger
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Understanding and using your
moogerfooger®
MF-102 Ring Modulator

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Summary of Contents for Moog Moogerfooger MF-102

  • Page 1 Understanding and using your moogerfooger® MF-102 Ring Modulator...
  • Page 2 MIDI-to-CV converter, or any other source of control voltages to 'play' your MF-102. While you can use it on the floor as a conventional effects box, your MF-102 is much more versatile and its sound quality is higher than the single fixed function "stomp boxes"...

  • Page 3: Getting Started

    Here are some simple instructions on how you can quickly plug in and try out your MF- 102. 1. Unpack your MF-102. You can place it on a table or on the floor. We suggest that you place it on a table while you become familiar with its features.
  • Page 4 Press the stomp switch. The BYPASS light will now turn green. Play your instrument. Your instrument's signal is now going through the ring modulator. Listen to how the MF-102 affects the quality of your instrument's tone. You will hear a distinct vibrato. Note that the AMOUNT knob affects the strength of the vibrato and the RATE knob affects the vibrato's speed.
  • Page 5 HOW A RING MODULATOR WORKS Let's start with some definitions. Please read this section carefully, as it will help you to understand the basic ideas underlying ring modulation. Sound is a vibration of the air. The speed of vibration is called the frequency. It is measured in Hertz (Hz).
  • Page 6 Now we're ready to talk about what a ring modulator is. In electronics, modulation is any process in which one waveform is changed in response to the contour of another waveform. For instance, amplitude modulation is the shaping of the amplitude (strength) of one waveform by the contour of another waveform.
  • Page 7 CARRIER IN jack on the rear panel. Thus, if you do not plug anything into this jack, then your MF-102’s carrier oscillator is automatically connected to the second input of the ring modulator. The carrier oscillator’s frequency is determined by the setting of the FREQUENCY knob and the LO-HI switch above it.
  • Page 8 You will hear the tremelo get faster and faster. When the carrier frequency is above 20 Hz or so, the MF-102 output will no longer sound like a tremelo. Instead, your sound will begin to sound “rough” and “detuned” because the two sets of harmonics are far enough apart so you begin to hear them as two distinct sounds.
  • Page 9 25 times a second, with either a square wave or a sine-like wave contour. To hear the effect of changing the carrier oscillator frequency, first set up your MF-102 as follows:...

  • Page 10: Expression Pedals And Voltage Control

    Watch this light when you set the DRIVE control for the desired effect. Figure 9 - Block diagram of the MF-102, showing panel controls, switches, and jacks. (Pedal/control jacks are not shown, but perform the same functions as the control knobs.)
  • Page 11 See the Technical Information section on Page 13 for more information on pedal specifications. When you plug an expression pedal into one of the pedal inputs on your MF-102, the pedal adds to the effect of the corresponding control. For example, let’s say that you plug an expression pedal into your MF-102’s MIX input.

  • Page 12: Technical Information

    POWER: The MF-102 works satisfactorily on +9 to +15 volts DC and uses about 100 milliamperes of current. If your power adaptor shows up missing or inoperative, you can power your MF-102 from any other power adaptor with a +9 volt or +12 volt rating and with the same power connector.
  • Page 13 Or, if you do not plan to use any expression pedals with your MF-102 but would like to apply control voltages to one or more pedal control inputs, you can use patch cords with regular two-conductor (tip-sleeve) phone plugs. These will short out the +5.7 volt supply to the ring contacts.

  • Page 14: Limited Warranty

    LIMITED WARRANTY Moog Music warrants that its products will be free from defects in materials or workmanship, and shall conform to specifications current at the time of shipment, for a period of one year from date of purchase. During the one-year period, any defective products will be repaired or replaced, at Moog Music's option, on a return-to-factory basis.
  • Page 15 POWER REQUIREMENTS: +9 to +15 volts DC. Nominal current is 100 milliamperes. MOOG MUSIC Inc. 554C RIVERSIDE DRIVE ASHEVILLE, NC 28801 Phone: (828) 251 0090 FAX: (828) 254 6233 EMAIL: info@moogmusic.com WEB SITE: http://www.moogmusic.com Entire Contents ©1998, 2003 by Moog Music Inc...