RMI Harmonic Synthesizer

Harmonic Synthesizer
Manufacturer Rocky Mount Instruments
Dates 1974-76
Price £2395 GBP
$2995 US
Technical specifications
Polyphony Monophonic
Timbrality 1-part
Oscillator Additive Two independent digital harmonic generators
LFO 2 (Saw Up, Saw Down, Sine, Square)
Synthesis type Analogue and Digital
Filter 1 (24dB Slope (4-pole), Band-Pass, Low pass, Resonance)
Velocity expression Yes
Input/output
Keyboard 48 keys
External control Expression 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 suchas as tremelo, 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 115V 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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