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Sequential Circuits | Prophet-10
This rarely seen monster analog synth is by far one of the fattest and nicest vintage synthesizers. The Prophet 10 is simply two glorious Prophet 5 synthesizers stacked together. That gives 10 voices with 20 of Sequential's unique analog VCO oscillators at 2 per voice for a big fat analog dream! The Version 1 series suffered from major overheating and unstable tuning problems making it clumsy and unreliable to use. It also had a standard 61 note keyboard and looked just like the P5. A modification was made to try to solve the heating problem by adding heatsinks on the back. The big Prophet 10 logo had to move, and has been resized because of that.
Then came a bigger and better looking stacked keyboard version (as seen above); to be known as Version 2. Better chips were designed which soon cured most of the overheating problems. While Rev. 1 & 2 Prophets used chips made by SSM (Solid State Microdevices) which were fatter sounding but less stable, the Rev 3 Prophets changed to CEM (Curtis Electronics Manufacturing) chips. These increased their stability and reliability. Some audiophiles think they sound thinner than the SSM chips. However tuning and other functions were still somewhat unstable.
Version 3 (pictured top) was by far the best and most stable. 20 oscillators (2 per voice), 10 voices, 2 independent 61 note keyboards and all the great sounds and editing facilities as the Prophet 5! Built in Tuning tones and Auto-Tuning functions help make sure you won't go out of tune. And top notch circuitry and design prevent overheating. Multiple keyboard modes allow for true flexibility for different performance / voicing needs! The Prophet 10 is a truly fat and classic analog instrument.
Although each voice is keyed independently, all five voices in each polyphonic bank function from the same patch setting, and are therefore homophonous. However, each of the two 5-voice synthesizer banks can operate on a completely different program, and can be articulated independently via the two keyboard manuals. In other words, two different programs can be used at any one time. One is the UPPER program, with one 5-voice synthesizer usually tied to the upper keyboard, and the other is the LOWER program, with the other 5-voice synthesizer usually tied to the lower keyboard.
|LFO||1 LFO with rate|
|Engine Detailed||2 OSC. per voice. square / pulse / tri / saw. Poly Mod. Rev1, 2 SSM, Rev3.x CEM|
|Filter (VCF)||Low pass resonant VCF with ADSR|
|Recording||Sequencer: Polyphonic 6 track (4,000 to 10,200 notes)|
|Controllers||Rev3. Built in Tuning tones and Auto-Tuning|
|Keys||61 (Rev1) 2x61 (Rev2, 3)|
|Extra info||Midi retrofit on Rev3.x only|
|Produced:||1980 - 1980|
|Legend:||Obvious||Y: Yes, N: No, N/A: Not Applicable|
|VCO||Voltage Controlled Oscillator||DCO||Digital Controlled Oscillator|
|LFO||Low Frequency Oscillator||Sub||Sub Oscillator|
|VCF||Voltage Controlled Filter||VCA||Voltage Controlled Amplifier|
|Velocity||As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key.||Aftertouch||Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.|
|Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.|