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This page displays the information available for the Rmi-Harmonic Synthesizer (Sphere item # 11160).
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Detailed description, from the owner or the reseller, prices and supported shipment are displayed. Question and answers as well as reserving or bidding for the item are also available on dedicated pages by using the links on the menu.

Detail    top
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 Make Rmi
 Model Harmonic Synthesizer
 Description THIS ULTRA-RARE RMI HARMONIC SYNTHESIZER sounds as wild and wonderful as it looks. Having 2 sets of 16 harmonic drawbars allows one to rapidly create extraordinary tones in stereo (separate oscillators for left and right channels). Wide-ranging vibrato/tremolo effects, noise modulation, pitchbend, portamento, four octave ranges, oscillator sync, arpeggiator, pedal-controlled filter are just some of the versatile functions provided (most of them independently for each oscillator). This has been kept since purchase from VEMIA in 2005 in a clean, smoke-free home studio. It is in remarkable condition, very little wear and tear apart from some scuffs on the bodys. A pedal is provided to control the very powerful filter (modified Roland volume pedal). FROM THE RMI BROCHURE: The Harmonic Synthesizer - a precise approach to synthesis. You are given accurate control of waveforms by Digital harmonic Generators [2 digital oscillators with 16 sliders for producing harmonics 1x to 16x]. At your command are relative intensities of all overtones to beyond audibility! Each of the two digital harmonic generators produce an independent audio output for exotic contrasts in stereo. Preset waveforms can be selected or mixed with the generators for instant changes. Dynamic effects are created by voltage-controlled filters with low-pass, bandpass, and high-pass mixable outputs. Intricate melodic and rhythmic sequencer patterns are created by holding chords. Digital circuitry insures tuning stability and drift-free performance. The controls are rugged. The case is tough. RMI enjoys a history of building trouble-free instruments.' QUANTITY PRODUCED: 100? USED BY JEAN-MICHEL JARRE in Oxygen 4 chorus, Oxygène 5 (sequences), Oxygène 11. PRODUCTION PERIOD: 1974-76 Mark: RMI (Rocky Mount Instruments inc. USA). FILTER: Low Pass, Band pass, High pass (Left Channel Only). Modulations: VCF sweeps (sweep up, sweep down, time and via LFO) - also by optional filter pedal. SEQUENCER - Percussion patterns or melodic lines will be played as long as chords are held. Sequences can arpeggiate from bottom to top or random. STEREO AMPLIFICATION - Left and right Harmonic Generators provide independent audio outputs for feed to musical instrument amplifiers. TWO DIGITAL HARMONIC GENERATORS - 16 heavy duty slide pots adjust the intensities of the fundamental frequency and overtones to beyond audibility, allowing precise waveform control. A manual low-pass filter provides further coloration. Playing range can be moved 4 octaves by the Octave Shifter. Tuning is adjusted (over more than one octave range) by a slider. Output level is controlled by a slider. Final volume can be foot-controlled. Outputs from the Harmonic Generator or any of the 5 preset waveforms (clarinet, pulse, flute, horn, reed) can be selected or mixed using coloured illuminated pushbuttons. AM & FM CONTROLS - Frequency and/or amplitude modulation of the Harmonic Generators by any of the 4 waveforms is controllable in rate and degree. Noise modulation of frequency is available. Pitch Bend provides further frequency deviation upon attack of the note - time and depth are variable. Portamento is activated for both generators by a long touch bar immediately above the keyboard. Portamento speeds can be controlled independently for each generator. VOLTAGE-CONTROLLED FILTER - Low-pass, bandpass and high-pass outputs are mixable. Resonance is variable. Controls include envelope generator, LFO, sine and optional foot pedal. The left generator only can be routed through the filter. PACKAGE - A tough black vinyl case houses the synthesizer. The keyboard and controls are enclosed by a cover for travel. Dimensions - 9.5 inches high x 42.5 inches wide x 23.5 inches deep. Four heavy chrome steel legs unfold from the bottom of the keyboard, adding 26.5 inches to the height. THE FOLLOWING MINOR POINTS may need some maintenance: (1) Left channel¹s envelope does not quite return to zero volume (i.e. the oscillator can be heard very softly even when not being played). (2) Ditto re right channel but only when in Percussion Mode. (3) Some hum on left channel when using filter. (4) Two knobs are missing their silver-coloured caps (does not affect function). (5) Portamento bar has been disabled (i.e. portamento can be activated/varied using the left/right channel controls, but not turned on/off using the bar) - should be easy to re-activate. INCLUDES custom filter pedal, keyboard cover, folding legs, copy of manual and tuning/alignment guide, details of maintenance carried out since 2005. Age: 37 years Weight: 37kg Condition: Very Good Location: Japan Plug type: US Standard Voltage type: Internal 115V power supply. Serial number: 139
 Age n/a
 Weight n/a
 Condition Very good
 Location Japan 
 Vat Not from a VAT-registered business. But VAT / duty may be due if importing from outside your trade bloc.
 Quantity 1 item is available from the owner
 Options User manual : No
  Service manual : No
  First owner : No
  Original boxes : No
 Plug type Usa standard plug
 Voltage type Internal 110V power supply
 Status Item is still available
 Sale type The item is on the auction rooms
 Ending on 26/04/2013
 Serial number 139
 Sphere reference # 11160
 Statistics Created on : 14/04/2013 
Changed on : (Not updated) 
  Published on : (Not published)
  Displayed : 2454 time(s) by members and guests  
Safety All electrical items sold in VEMIA are deemed to be trade sales. No warranty of electrical safety is given or implied. Many items are vintage and would not pass current electrical safety standards. It is the responsibility of the buyer to ensure that items are safe to use in their future environment - if necessary by using the services of a professional.


Prices and conditions    top
The following section gives you the prices as well as shipment and payment conditions associated with the item. Payment is always requested in GBP. Converted price is shown for information and converted with Sphere standard currency rate.

Shipment and Payment links gives you access to an extended description of our rating :
 Start price 2480 GBP
 Converted price (1) 2480 GBP
 Shipment International or local shipment to pay
 Packing costs 0 GBP
 Payment Full pre payment needed
 Auction bid step 20 GBP
 Auction highest bid 0 GBP
 Converted highest bid 0 GBP
 Leader or winner *None
 (1) Currency conversion Note that conversion rates were last adjusted on 11 October 2020 at 11:19 CET. They are there to give you a rough guide to the bid price in your currency. Please check for a more up-to-date conversion at The bid price will be the actual price in pounds (GBP) at the moment the auction closes. This will be roughly converted to your currency for your information.

For technical reasons, we are unable to update the conversion from GBP to Euro during the auction, although it has changed by well over 10%. If you are in the euro zone please check the current rate at

Payments from UK and non-Euro currency regions must always be in GBP. Payments to and from Euro currency regions can be in Euros via our French bank.The applicable Euro amount will be the exact amount specified on your invoice or credit note. For more info please see the FAQ about exchange rates.

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