The MC-4 is a synthesizer controller designed to expand the range of any synthesizer and take the work out of complex cornposition. ~A digital sequencer, the MC-4 will accept data entered either from its numerical keyboard or frorn the CV signals from a keyboard synthesizer in real time.

Real tirne input is possible using either CV plus gate or data may be entered sepa rately by loading the pitch information first and using the Gate Rewrite function to later enter the rhythm. It is possible to listen to previously inputted data while entering new information.

Each channel has two independent CV outputs. These outputs are available for the control of nearly any control voltage func tion on a synthesizer. When the note values (Gates) rernain the same, one channel may be used to voice two note chords.

• A Multiplexing function is also included on each channel. This can be used to control portamento, vibrato, or similar synthesizer functions.
• Awidevarietyofeditingfunctionssimplify composition on the MC-4 including; Copy, Insert, Delete, Forward Step, and Back Step.
• Repeat commands can be used on each channel to specify repeat times and can also be used for easier data entry and for more economical use of memory.
• CV and other data can be transposed on each channel. Data can also be copied with transposition. These functions are very helpful when inputting arpeggio and bass patterns.
• Step and gate time data can be preset. Once frequently used step and gate time values are preset, data can be entered simply by modifyin
• Tempo can be entered by using a cor responding numerical value. The Tempo is then variable by-50% to 100%.
• Total playing time can be displayed and tempo can be accurately set to any pre determined playing time by adjusting the Tempo Control while monitoring the time value.
• Remaining memory capacity can be indi cated on the display as a percentage.
• Data can be stored on cassette tapes. A data number is assigned when information is stored on tape and the data number is then used during loading, search and read procedures. Whenever a data number is not used during loading, the cued data is used in its place.
• Input and output synchronization jacks using an FSK code allow tape synchroni zation with a multi-track tape recorder. Synchronized input and output pulses can be used for parallel playing of the MC-4.
• Sync In/Out DIN jacks are also provided and can be used to synchronize the perfor mance of rhythm machines and other machines. They can also be used to syn chronize two or more MC-4's.
• The Tempo CV input controls tempo by means of an external voltage. Tempo can also be changed via CV data by connecting a CV input with any CV output. By doing this, total playing time can be determined by the controlling tempo.

The EXT START and EXT STOP/CONT PLAY jacks allow the user to control the start/stop performance of the MC-4 by means of an external foot pedal or an external voltage.