Prophet synthesisers are often termed 'digital-analogue hybrids' because many of the analogue style controls create digital data for the built-in micro system, which in turn programs the voices.
E&MM will be presenting detailed discussion of the MIDI shortly. Gone are the control voltage and trigger ins and outs in favour of this micro controller - a bold first step towards what is likely to become the universal link for the synthesiser. Only the Prophet-10 has a 'drone' hold function, although the '5' has a 'release' footswitch socket.īut the biggest innovation must surely be in the provision of MIDI (Musical Instrument Digital Interface). The filter remains the same, but the LED indicators are restricted to the touch program section. The Poly-Mod section does not control oscillator pulse width and there's no protection switch for the sound programs, but the keyboard range is the same 5-octaves (C to C).
Pitchbend range is less, but there's polyphonic portamento (no Prophets have glissando). There's no variable scale mode or A-440 tuning - the latter may well be an important omission. Keyboard tracking for the filter has two modes instead of one.
You can't make the second oscillator run as an extra LFO or independently from the keyboard, but the first oscillator gains a triangle waveshape. The LFO only has triangle and square modulation (no sawtooth) but adds programmable LFO depth - a great bonus. The noise source has gone, which will put off some people. There's no facility for 'defeating' voices but this is no longer necessary with the new circuitry and extensive digital control. One hundred sound programs can be stored, edited and saved on cassette - the 5 can hold 120 but only save 40 at a time. The Prophet-600 contains six individual 'voice' synthesisers, with dual VCOs, VCFs and VCAs with independent ADSRs, instead of five. Making some quick comparisons reveals that you are really getting something special for your money, not just a watered-down version of the P-5. A polysequencer, remote keyboard, and Pro-FX system complete the company's main product line at present ( more details of SCI products are in the E&MM January '83 issue), and while the interest in the forthcoming Prophet t8 is no doubt strong, the Prophet-600 has suddenly appeared as the low cost alternative to the Prophet-5. These two synthesisers, along with the popular monophonic Pro-One, have established SCI as an important contributor to the synthesiser world. The Prophet-5 has been tremendously successful and since then SCI have manufactured another polyphonic machine, the Prophet 10, with 10 voices and dual keyboards. if any of your other keyboards can supply these CVs then you should be able to control your Pro One directly from another keyboard without the need of a MIDI to CV converter.Įmail for options that include MIDI kits and enhancements to your Pro One's on-board sequencer and arpeggiator.Early in 1978, Sequential Circuits Inc (SCI) introduced the Prophet-5 polyphonic synthesiser which was one of the first programmable instruments to emerge, benefitting from the new micro technology of the time.
SEQUENTIAL CIRCUITS PRO ONE OPERATION MANUAL MANUAL
The Pro One operations manual states the CV IN requires a 5v GATE and 1 volt/octave CV (0-10v range). However, if you choose to continue to use a membrane switch keyboard, the rubber keystops are the same for all Pro One keyboard, whether J-wire or membrane switch style. At this time a MIDI to CV converter is the easiest solution to by pass a membrane switch keyboard keyboard and trigger a Pro One. In the past any successful repairs to the troublesome membrane switch contacts were only temporary at best due to the inherent unreliability of the switch design. Although any Pro One can use either a J-wire style or membrane style keyboard, the probability for finding a replacement J-wire keyboard is very unlikely since they only exist in other Pro Ones.
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