RMI Harmonic Synthesizer

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Harmonic Synthesizer
ManufacturerRocky Mount Instruments
Dates1974-76
Price£2395 GBP
$2995 US
Technical specifications
PolyphonyMonophonic
Timbrality1-part
OscillatorAdditive Two independent digital harmonic generators
LFO2 (Saw Up, Saw Down, Sine, Square)
Synthesis typeAnalogue and Digital
Filter1 (24 dB/octave slope (4-pole), Band-pass, Low-pass, Resonance)
Velocity expressionYes
Input/output
Keyboard48 keys
External controlExpression Pedal, CV IN

The Harmonic Synthesizer was a monophonic synthesizer[1] that was first produced in 1974 by the American Rocky Mount Instruments[2] The case was made of black vinyl and had four chrome legs to support it. It features two sets of 16 harmonic drawbars. It also had a number of effects such as tremolo, portamento, noise modulation, oscillator sync and an arpeggiator. The digital circuitry ensures tuning stability during use.[3] A total of 250 units were produced and only four units were ever sold[4] in Europe.[5]

AM & FM controls[]

AM and FM control with Voltage Controlled Filters. (VCF)

Arpeggiator[]

The sequencer can be programmed to play notes from top to bottom, bottom to the top or random notes when several keys are played at once.

Presets[]

  • Clarinet[6]
  • Flute
  • Pulse
  • Horn
  • Reed

Power supply[]

The unit is powered by an internal 115 V AC power supply.

Notable users[]

See also[]

https://soundcloud.com/doombient-music/rmi-harmonic-arpeggiator-demo

References[]

  1. ^ "RMI Harmonic Synthesizer (1974) | Aerozone JMJ". aerozonejmj.fr (in French). Retrieved 2018-08-22.
  2. ^ text., Synthmuseum.com website, including all information and images, is copyrighted as a collective work and is the property of Synthmuseum.com, Inc. This copyright does not supersede any copyrights that may exist for previously copyrighted images and. "Synthmuseum.com - Rocky Mount Instruments : Harmonic Synthesizer". synthmuseum.com.
  3. ^ "RMI Harmonic Synthesizer". Encyclotronic.
  4. ^ "RMI Harmonic Synthesizer". www.matrixsynth.com. Retrieved 2018-08-22.
  5. ^ "RMI Harmonic Synthesizer (1974) | Aerozone JMJ". aerozonejmj.fr (in French). Retrieved 2018-08-22.
  6. ^ "RMI Harmonic Synthesizer". www.jarrography.free.fr. Retrieved 2018-08-22.
  7. ^ Inc., Equipboard. "RMI Harmonic Synthesizer". Equipboard.
  8. ^ "RMI Harmonic Synthesizer". Encyclotronic. Retrieved 2018-08-22.


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