Sequential Prophet 10 Keyboard

€4.579,00

Sequential Prophet 10 Keyboard

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Sequential Prophet 10 Keyboard

Name: Sequential Prophet 10 Keyboard
Brand: SEQUENTIAL
SKU: 17900011
Price: 4579.00 EUR
Availability: OutOfStock

Cod:

17900011

€4.579,00

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Description

In this velocity and aftertouch sensitive 5-octave keyboard, the Sequential Prophet 10 embodies all three revisions of the legendary synth (Rev1, 2, and 3) in a bi-timbral synthesis structure with 10 voices of polyphony (2 layers x 5 voices). 2 CEM 3340 VCOs per voice, Curtis (CEM 3320) analog filters, and SSI 2140 low-pass filters designed by Dave Rossum.

Prophet 10 Polyphony and Bi-timbrality

The Sequential Prophet 10 is bi-timbral: it can simultaneously play two sounds of 5 voices each in two different modes. In Split mode, the keyboard is divided into two, with one sound assigned to the lower octaves and another to the upper octaves. In Stacked mode, on the other hand, the Prophet 10 will be able to play two sounds simultaneously across the entire length of the keyboard; in this mode, the available voices per Program also become 5.

Sound Synthesis in the Prophet 10 Rev 4

The oscillators of the Prophet 10 Rev 4 are the source of the warm, deep, and powerful sound this synthesizer generates. These are not ordinary analog oscillators. The 2 VCOs of the Prophet 10 rev 4 were designed and built with the same chip used in vintage Prophets: the CEM 3340. It was only in 2016, 9 years after the untimely passing of its creator Doug Curtis that the company he founded decided to reproduce this chip. The two oscillators, called A and B, can generate saw and variable-width pulse waves. Oscillator B also features a triangular wave. One of the peculiarities that made this synth famous is that each oscillator can simultaneously play multiple waveforms, which results in a unique, rich, and full identifiable sound. In the oscillator B section, there is a switch called LOW FREQ: once activated, it will be able to reproduce very low frequencies, thus usable as an LFO. With the appropriate DETUNE potentiometer, it is possible to vary the pitch of oscillator B by approximately a semitone relative to oscillator A. As in previous versions, this Rev 4 also includes the ability to synchronize oscillator A to oscillator B to create complex and harmonically rich sounds. When we activate the Unison function, the Prophet 10 behaves like a monophonic: it plays only one note at a time. Use it to create full, imposing basses and leads, dedicating all 10 voices to a single note: 20 oscillators per key! Holding down the Unison button will activate the Chord Memory function to store the intervals between notes of a chord, then transpose and reproduce them starting from the note (fundamental) you play on the keyboard.

The Filter Section of Prophet 10 rev 4

The SSM 2040 chip used for the filters of the Prophet 10 rev 1 and rev 2 was highly appreciated; however, it was not particularly stable and functional. The chip of the third version, the CEM 3320, in addition to its identifiable sound signature, made a fundamental contribution to the stability and reliability of the instrument. The characteristics of these two chips were similar: both produced a 4-pole resonant low-pass filter, but with different sonic results. In designing this fourth revision of the Prophet, the Sequential team wisely decided to integrate both filters into the instrument. With the Rev button located next to the Cut-off potentiometer, we can freely decide whether to select the Rev 1/2 filter or the Rev 3 filter. The difference between the two filters is by no means subtle, as variables such as different envelope response times come into play. The integrated circuit with which the filter reproducing revision 3 is built is the same component designed by Doug Curtis in 1979. The SSM 2040 chip of revisions 1 and 2 has been replaced with its modern counterpart SSI 2140 designed by Dave Rossum.

The Prophet 10 Vintage Mode Potentiometer

In addition to sourcing the original hardware components used in the vintage version of the Prophet 5, Sequential conducted extensive research to determine what made the sound so unique. It was discovered that many of these characteristics were due to slight fluctuations and differences in response times from voice to voice, not only in the frequencies of the individual VCOs but also in the filters, envelopes, and amplifiers. To reproduce all of this in this new Rev 4 of the Prophet-10, Sequential added the Vintage knob. Use it to continuously transition from revision 1, the rarest and most capricious Prophet of all, up to revision 4: which is the most stable and precise version ever.

Poly Mod & Enhanced Unison

Beyond the unmistakable tone of its oscillators and filters, much of the classic sound of the Prophet 10 is a result of the connections that the Poly Mod section allows us to achieve. True to the original, the modulation sources are the filter envelope and oscillator B. Destinations include oscillator A frequency, oscillator A pulse width, and filter cutoff. It is called Poly-Mod (polyphonic modulation) because the Prophet can play up to five voices, meaning that each voice must apply the programmed modulation to the selected destination. For example, if we set oscillator B to LO FREQ mode, we will have just created 5 LFOs: one per voice. At this point, we activate keyboard tracking, and each of these LFOs will modulate the destination with a different frequency speed from note to note. The range of possible sounds defies its simplicity. Another welcome and famous mode in the Prophet 10 is Unison, which now features a configurable number of voices from one to ten with variable detuning and chord memory.

Velocity and Aftertouch on the Prophet 10

Although Sequential's mission was to make the new Prophet 10 as accurate, authoritative, and faithful to the original as possible, they could not resist adding a couple of modern improvements to increase expressiveness: velocity sensitivity and aftertouch. These allow the new Prophet 10 to do things the original never could: filter sweeps, LFO modulations, and volume changes at your fingertips, without taking them off the keyboard.

Programming the Prophet 10

The panel of this keyboard synthesizer presents a potentiometer for each function, thus allowing immediate access to all sound shaping controls. With the PRESET button, we can enter LIVE PANEL MODE: the sound of your Sequential Prophet 10 will automatically switch to the values corresponding to the physical settings of the potentiometers and buttons you see on the panel. What you see is exactly what you hear. 200 permanent factory programs and 200 rewritable user programs are included, which also include the original 40 preset set from 1978. Sounds that made history, used in countless recordings and film soundtracks from that era to the present day.

Prophet 10 Keyboard and Connections

All this analog power is housed in a robust chassis with a five-octave Fatar keyboard (61 full-size keys) semi-weighted, MIDI inputs and outputs via DIN and USB, Gate and CV. Since each Prophet 10 is built with hand-selected woods, the image and color may vary from piece to piece, thus making each instrument unique and unrepeatable.