 Roland MC 8 MicroComposer. The Roland MC-8 MicroComposer was introduced in 1977 at a price of around $8000 as the world's first digital microprocessor driven, VC (Voltage Control) unit, (a pre-MIDI sequencing method used for electronic music). The MicroComposer could precisely adjust multiple sound producing and effects elements of a synthesizer, such as the VCO (Voltage Controlled Oscillator), the VCF (Voltage-controlled filter), and other voltage controlled components very rapidly, which is nearly impossible to do manually by a performer. The MC-8 was designed to work with the large complex modular synthesizers such as the Roland System 100 and System 700. It could also be used during a live performance to control lighting by using pre-programmed, timed pulses, and pre-programmed timed voltage levels.
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