Orca's Heart v2

orca's heart v2

An eight-voice algorithmic sequence generator, the new version of orca's heart. This module generates sequences using an algorithm - instead of programming a sequence, you select the scale notes and control the algorithm parameters. You can use it to sequence up to 8 voices and produce 8 modulation CVs and gates that can be used to modulate Orca's Heart itself or other modules in your patch.

quick start

For the most basic use:

• connect VOICES CV outputs to 1V/Oct (pitch) oscillator inputs
• connect VOICES gate outputs to the envelopes that are used to control the VCAs the oscillators are going through
• select scale notes - the white LED shows the currently selected scale
• adjust sequencer speed with the SPEED knob
• use the knobs to change algorithm parameters to modify the sequence
• use MODULATION outputs to modulate voice parameters (oscillator waveform / filter cutoff / etc)

knob functions

Knob	Function
SPEED	the internal clock speed (BPM)
LENGTH	the length of the sequence (steps)
TRANS	transposition (1V/Oct)
GATE L	voice gate length (sec)
VOICES	number of voices
SPREAD	spread voices across a step
ALGO X	algorithm X parameter
ALGO Y	algorithm Y parameter
SHIFT	algorithm shift parameter
SPACE	add more "space" to sequence
ROTATE	rotate sequences for different voices
XMOD	add internal cross modulation

See below for more details on what each function does.

scale section

The top section with the red inputs / buttons / knobs is the scale section. This is where you select the notes that will be used in a generated sequence. There are two scales available, and you can switch between them manually or by sending a trigger to Toggle Scales A/B input (next to A and B labels). The manual switch can also select both scales at once, giving you a two octave range (scale B is transposed an octave up in this case).

There are 16 pentatonic scale presets available which can be selected with a knob or a control voltage. The linked button enables or disables presets - make sure to disable them to prevent overwriting the notes that are currently selected. The presets cannot be overwritten - if you select a preset and change any notes, those changes will not be stored in the preset.

Each scale can be transposed an octave up with a button or a gate sent to the corresponding input.

clocking

The module has an internal clock which you can control with the SPEED knob (the value is BPM). This clock is sent to the Clock output. The internal clock is disabled if something is connected to the Clock input - send a trigger here to sync Orca's Heart to another module.

outputs

There are two main groups of outputs (in addition to the Clock and Reset outputs):

• VOICES - 8 CV and gate outputs for the 8 generated sequences
• MODULATION - 4 modulation CV and gate outputs for additional modulation

Modulation CVs (which produce voltage in the 0..+10V range) are stepped CVs that are also generated by the algorithm and will be affected by the algorithm parameters.

The blue colour denotes polyphonic outputs - if you use Orca's Heart with a polyphonic module such as Plaits, you can use a single cable for all 8 voices by connecting to CV/gate output 1. The polyphonic modulation outputs also produce 8 CVs/gates, if you need to use modulation CV/gate 5-8 with a non polyphonic module, connect output 1 to a Split module.

Lines module can help with visualizing the polyphonic outputs.