The Prophet-5 is an analog synthesizer manufactured by Sequential Circuits between 1978 and 1984. It was designed by Dave Smith and John Bowen. The Prophet-5 was the first fully programmable polyphonic synthesizer and the first musical instrument with an embedded microprocessor. Initially, they developed the Prophet-10, a synthesizer with ten voices of polyphony; however, it was unstable and quickly overheated, creating tuning problems. Smith and Bowen removed half the electronics, reducing the voices to five and creating the Prophet-5.
It is capable of a delightful analog sound unique to Sequential's Prophet series in which the P5 was King! Five voice polyphony - two oscillators per voice and a white noise generator. The analog filters, envelope and LFO all sound great and are extremely flexible. The P5 had patch memory storage as well, which scanned and memorized every knob setting for storing and recalling your sounds - a desperately needed feature at the time!
The P5 lacked MIDI (a feature that came later on the P5 spin-off, the Prophet 600). But it is still loved even today for its great string sounds, analog effects, and punchy analog basses. Unfortunately the P5 is not immune to the dark side of vintage synths - it has its fair share of analog synth problems such as unstable tuning, it's difficult to repair, lacks MIDI, etc.