Pittsburgh Modular Microvolt 3900, Manual

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13. Midi / Arpeggiator (continued d)
Three Clock Sources
The midi section has 3 clock sources: internal, external midi, and external gate. The clock is used to advance the
arpeggiator and the random modulation source. Set the clock source by pressing and holding the edit button(30)
then pressing the clock button(29). The first time the clock button is pressed it will show the active clock source.
Additional presses of the clock button will cycle through clock source options. Internal clock active is shown by
illuminating the arpeggiator button(27) LED. External clock active is shown by illuminating the hold button(28)
LED. External gate source is shown by illuminating both the arpeggiator button (27) and hold button(28) LEDs.
The clock source is saved in memory and recalled when the Microvolt 3900 is powered on.
Internal Clock
The internal clock source utilizes the clock button to modify the rate of the internal clock. Tap the clock button(29)
to change the tempo of the clock. The internal clock rate is saved in memory and recalled when the Microvolt
3900 is powered on.
External Midi Clock
The external midi clock responds to midi start/stop messages and midi tempo from an external midi clock source.
In external midi clock mode, the clock button(29) acts as a clock divider cycling through 6 available clock
divisions. ÷ 1, ÷ 2, ÷ 4, ÷ 8, ÷ 16, ÷ 32. Set the midi clock division by pressing the clock button(29). The first time
the clock button is pressed it will show the active clock division. Additional presses of the clock button will cycle
through division options. The midi clock division is saved in memory and recalled when the Microvolt 3900 is
powered on.
External Gate Clock
The external gate clock responds to most waveforms that rise above 2.5v. In external gate clock mode, the clock
button(29) acts as a clock divider cycling through 6 available clock divisions. ÷ 1, ÷ 2, ÷ 4, ÷ 8, ÷ 16, ÷ 32. Set the
external gate clock division by pressing the clock button(29). The first time the clock button is pressed it will show
the active clock division. Additional presses of the clock button will cycle through division options. The external
gate clock division is saved in memory and recalled when the Microvolt 3900 is powered on.