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Hands On – The Minimoog (part 6)

The Midi Mini version of the Mini Moog, by Studio Electronics, offers enhanced features to bring the original instrument right up to date…

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Midi Mini Additions

The Midi Mini version of the Mini Moog, by Studio Electronics, offers enhanced
features to bring the original instrument right up to date:

  • MIDI Velocity control of the VCA level
  • MIDI Velocity control of the VCA cut off frequency with variable sensitivity
  • Additional low frequency oscillator
  • Additional LFO or noise generator can be modulation source
  • MIDI modulation wheel control of low frequency oscillators
  • MIDI modulation wheel control of filter cut off frequency
  • MIDI Aftertouch modulation of filter cut off frequency
  • Oscillator 2 can be synced to Oscillator 1
  • Oscillator 2 can be routed to Oscillator 3 or filter
  • Filter envelope can be retriggered with each key press or only on staccato
    key presses

  • Selectable low, last or high note priority
  • Octave transposition switch
  • MIDI channel selectable

Minimoog tuning

Both the original Minimoog and the Midi Mini have three oscillators and a
reference oscillator producing the standard 440Hz tuning tone. If you need to
tune the instrument, I would advise ditching the internal reference as a long
term standard of correct pitch because this might drift, or be adjusted incorrectly.
Instead I would be inclined to use a modern tuning checker and set the VCO tuning
directly, or you could tune up the internal reference and use it to reset the
VCO tuning during the session because it shouldn’t drift over a short period.
For the rear panel adjustments, use a screwdriver with an insulated handle.


Tuning Oscillator 1

Ebook = Equipping Your Home Recording Studio
FREE EBOOK - Equipping Your Home Recording Studio
  1. Turn on the Power switch (On = Up) and allow the instrument to
    warm up for ten minutes before making adjustments.

  2. Set the controls as shown in Fig. 2 and make sure the Pitch Bend
    wheel is in the centre position.

  3. Switch on the A-440 reference tone.
  4. Switch on the Oscillator 3 Mixer switch. Adjust the Oscillator
    3 Frequency control to create a perfect unison with the reference tone.

  5. Switch off the A-440 reference tone.
  6. With Oscillator 3 on and now tuned to A-440, switch on Oscillator
    1. Press and hold high A and tune for near zero beating with Oscillator 3
    (two octaves below) by adjusting Range 1 on the rear panel. Fine tune for
    perfect zero beating with the front panel Tune control.

  7. Release high A and depress and hold low A. Adjust Scale 1 on the
    rear panel for perfect zero beating with Oscillator 3 (one octave above).

  8. Return to high A and observe that adjusting Scale 1 has a slight
    effect on the range. Repeat steps 6 and 7 until perfect zero beating is obtained
    at both low and high A.

Tuning the Oscillator Range Switch

  1. With Oscillator 1 on, high A pressed and zero beating with Oscillator
    3 (440Hz), switch the Oscillator 1 Range control on the front panel to the
    32’ foot position and adjust the Octave control on the rear panel for
    perfect zero beat tuning.

Tuning the Remaining Oscillators

  1. Return the Oscillator 1 Range switch to the 4’ position.
  2. Turn off Oscillator 3 using the Mixer switch.
  3. Turn on Oscillator 1 and Oscillator 2.
  4. Depress high A and hold. Adjust Range 2 on the rear panel for near
    unison with Oscillator 1. Adjust Oscillator 2 front panel Frequency control
    for perfect unison.

  5. Release high A. Depress and hold low A. Adjust Scale 2 on the rear
    panel for perfect unison. Repeat steps 4 and 5 until perfect unison is attained
    at low and high A.

  6. Switch off Oscillator 2. Switch on Oscillator 3 and click up the
    Osc-3 Control switch on the front panel.

  7. Set the front panel Oscillator 3 Frequency control to zero.
  8. Press high A and hold. Adjust Range 3 on rear panel for near unison
    with Oscillator 1. Adjust Oscillator 3 front panel Frequency control for perfect
    unison.

  9. Release high A and press and hold low A. Adjust Scale 3 on rear
    panel for perfect unison. Repeat steps 8 and 9 until perfect unison is attained
    at low and high A.

  10. Take a break!

What???

If you have used older analogue synths before then you will know this perfectly
well. If you have been brought up in the digital age then this might come as
a shock:


Advanced though it was when it first appeared, the Minimoog can only play one
note at a time.


!!!

David Mellor

Acoustics

Acoustics

In this course, trainer Joe Albano explains how sound interacts and is modified by the listening environment. Learn the powerful influence of acoustics on our perception and the propagation of sound.

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David Mellor