The Orca operations Manual

The base operators are present in every version of Orca, no matter the platform:

• A add(a b): Outputs sum of inputs.
• B subtract(a b): Outputs difference of inputs.
• C clock(rate mod): Outputs modulo of frame.
• D delay(rate mod): Bangs on modulo of frame.
• E east: Moves eastward, or bangs.
• F if(a b): Bangs if inputs are equal.
• G generator(x y len): Writes operands with offset.
• H hold: Holds southward operand.
• I increment(step mod): Increments southward operand.
• J jumper(val): Outputs northward operand.
• K konkat(len): Reads multiple variables.
• L lesser(a b): Outputs smallest of inputs.
• M multiply(a b): Outputs product of inputs.
• N north: Moves Northward, or bangs.
• O read(x y read): Reads operand with offset.
• P push(len key val): Writes eastward operand.
• Q query(x y len): Reads operands with offset.
• R random(min max): Outputs random value.
• S south: Moves southward, or bangs.
• T track(key len val): Reads eastward operand.
• U uclid(step max): Bangs on Euclidean rhythm.
• V variable(write read): Reads and writes variable.
• W west: Moves westward, or bangs.
• X write(x y val): Writes operand with offset.
• Y yumper(val): Outputs westward operand.
• Z lerp(rate target): Transitions operand to input.
• * bang: Bangs neighboring operands.
• # comment: Holds a line.

The special operators make use of a platform's devices, here are the suggested special operators:

• $ self(cmd): Send a command to Orca, or load external file.
• : midi(ch oct note velocity*): Send a midi note.
• ! midi cc(ch knob val): Send a midi control change.
• ; pitch(oct note): Send pitch byte out.
• / byte(high low): Send a raw hexadecimal byte.
• = play(ch oct note velocity*): Play note with built-in synth.

Source

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