The keyboard is pressure sensitive for which reason it not only emits a note voltage with a characteristic of one Volt per octave as well as a gate signal but also a pressure CV (0-6V). The keyboard's octave setting can be changes with two buttons in a range of seven octaves.
The KB-1 has four basic modes, selected with the MODE button.
- Monophonic: Only one note is interpreted, the CV/gate/pressure signals are mirrored from channel 1 to channel 2. There are six note priority settings to choose from: last note priority, low note priority and high note priority, all wither with or wothout re-trigger. The KEY button activates a stutter mode which generates more and more dense gate bursts with rising pressure, their rate being a multiple of the clock (x0, x2 or x4). The HOLD mode latches the gate on or off.
- Duophon: The keyboard interprets two fingers and emits for each of them a separate note CV, gate and pressure. Two note priorities can be selected from: last note priority with retirigger and low note priority with retrigger. KEY and HOLD have the same functions like in monophonic mode.
- Arpeggiator: plays a repetitive melody pattern in sync with clock source, interpreting up to 10 fingers in the order they touched the keys, including their individual pressure! The KEY button allows for transposition when HOLD is pressed and also generates gate bursts. RUN starts and stops the arpeggiator.
In EDIT mode you can adjust a number of settings:
- Trigger: Each note can play a single or double trigger. Random modes can create random gates at output 1 or at outputs 1+2. The active note and gate output can alternate between channels 1 and 2.
- Gate bursts: can be activated or deactivates.
- octave range; one, two or three octaves.
- The CV of channel 2 can be same as channel 1, one octave above it or two octaves above.
- Sequencer: Four patterns with up to 64 steps length can be programmes step by step, including notes, rests and various "modifiers" for each note:
- no re-trigger between notes
- pitch bend between notes
- 40ms trigger length
- Trigger with 7/8 length
- note generates double trigger
- note generates quadruple trigger
There are a number of settings for the sequencer as well:
- playback direction: forward, backward, random
- probability based gate bursts can activated or deactivated.
- Shift: first note of the sequence can be shifted one step forwards or backwards.
- CV of channel 2 can be identical to channel 1's, one octave above it or two octaves above.
The rate of the arpeggiator, the sequencer, the gate bursts, the triggers and also of the touch preset sequencers are determined by the clock which can be either applied from an external source or origin for the internal clock generator whose tempo can be set manually with a tap-tempo function using the CLOCK button.
When synchronising the KB-1 to an external clock sometimes it might be desired to have it playing slower than the clock. This can be achieved using the internal clock divider (divisors: 2, 4, and 8).
The abovementioned gate bursts which are probability-based, an be modified. Rests can be activated and their rhythmical pattern set (only seminotes, seminothes and quarter; seminotes, quarters and eighths.
When activated the four preset touch plates play a CV (0-5V) which is according to the value set with the potentiometer and a 40ms long trigger. In clock synchronised mode you can determine the playback direction (forward, backward, random) as well as the clock divider/multiplier (1/8, 1/4, 1/2, x1, x2, x4 or x4).
clock input, clock output
trigger oututs 1+2
preset CV output, preset gate output
per voice: 1V/octave CV output, pressure output, gate output
3U Eurorack module, 48HP wide, 35mm deep
power consumption: 160mA