The orca from linusschrab

Orca is a visual programming language, designed to create procedural sequencers on the fly.

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Requirements

Norns or Fates or device.

Orca for Norns supports 4 different engines, but in order for them to work they must be installed.

Documentation

Please refer to original docs for general Orca operation.

Keyboard Shortcuts

<tab> Info bar: Toggles info bar visibility
<esc> Unfocus: Removes selection focus
<space> Play/Stop: Toggles play state, stop kills all notes.
cmd/ctrl + > Adjust BPM: Increments BPM + 10.
cmd/ctrl + < Adjust BPM: Decrements BPM - 10.

Operators

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 halt: Halts southward operand.
I increment(step mod): Increments southward operand.
J jumper(val): Outputs northward operand.
K konkat(len): Reads multiple variables.
L less(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 jymper(val): Outputs westward operand.
Z lerp(rate target): Transitions operand to input.
* bang: Bangs neighboring operands.
# comment: Halts a line.

IO / Norns operators

$ r.note(scale-mode note): Outputs random note within scale.
? levels(param value): Sets selected volume level on bang.
/ softcut(playhead rec play level rate position).
\ softcut param(playhead param value): Sets softcut param on bang.
| synth(octave note): Plays a note with the synth engine.
- synth param(param value): Sets synth param on bang.
: midi(channel octave note velocity length): Sends a MIDI note.
% mono(channel octave note velocity length): Sends monophonic MIDI note.
! cc(channel knob value): Sends MIDI control change.
& midi in(channel): Outputs received midi note.
^ cc in(cc): Outputs received midi cc value.
~ crow cv(channel octave note attack release level):
] crow ii jf note(octave note level): Just Friends over i2c in voice mode.
} crow ii jf voice(channel octave note level): Just Friends over i2c in note mode.
` crow w/syn(octave note level):
> g.write(x y value): Sets grid led on bang.
< g.read(x y): Reads specific coordinates. If value > 6 outputs bang.
= OSC (path;x;y..): Locks each consecutive eastwardly ports. ; is delimeter for values.

R.NOTE

The R.NOTE operator $ takes 2 inputs(scale-mode, note).

This operator generates a scale based on the given mode (default is Dorian) and note/key (default is C). For example to generate an F natural minor scale enter $2F. There are 35 different modes to choose from:

1: Major
2: Natural Minor
3: Harmonic Minor
4: Melodic Minor
5: Dorian
6: Phrygian
7: Lydian
8: Mixolydian
9: Locrian
a: Gypsy Minor
b: Whole Tone
c: Major Pentatonic
d: Minor Pentatonic
e: Major Bebop
f: Altered Scale
g: Dorian Bebop
h: Mixolydian Bebop
i: Blues Scale
j: Diminished Whole Half
k: Diminished Half Whole
l: Neapolitan Major
m: Hungarian Major
n: Harmonic Major
o: Hungarian Minor
p: Lydian Minor
q: Neapolitan Minor
r: Major Locrian
s: Leading Whole Tone
t: Six Tone Symmetrical
u: Arabian
v: Balinese
w: Byzantine
x: Hungarian Gypsy
y: Persian
z: East Indian Purvi

LEVELS

The LEVELS operator ? takes 2 inputs(param, value).

There are 9 different params that can be modulated on the fly with this operator:

1: level output channels
2: level engine master
3: level softcut master
4: level ADC input
5: reverb engine level
6: softcut reverb level
7: reverb DAC level
8: softcut ADC level
9: softcut engine level

In order to trigger parameter setting a bang * has to occure on the left side of operator. The value is simply the percentage to set the level 0 is 0% z is 100%. For example ?5z will set the engine reverb to 100%, or ?2h will set the engine volume level to 50%.

SYNTH/ENGINE

The SYNTH operator | inputs vary based on selected engine, but (octave, note ...) are always required (along with a bang) to produce sound.

There are 4 different engine supported by Orca FM7, Passersby, PolyPerc, and Timber. Within the params menu engines can be changed. Note: when changing engines you will have to reengage the clock by pressing K3.

FM7 is a "Polyphonic Synthesizer for Norns With 6 Operator Frequency Modulation". When this engine is selected, the SYNTH operator | takes up to 4 different inputs (octave, note, voice, amp). For example |4C.. will play a C at the 4th octave (Midi scale).

octave
- values: 0-7
note
- values: A–G
voice
- values 0: 0s, z: 1.5s
amp
- values: 0: 0.0, z: 1.0

PASSERSBY is a "West Coast style mono synth". When this engine is selected, the SYNTH operator | takes up to 6 different inputs (octave, note, velocity, timbre, pitchBend, pressure). For example |4Cz... will play a C at the 4th octave (Midi scale) with a velocity of 255.

octave
- values: 0-7
note
- values: A–G
velocity
- values 0: 0, z: 125
timbre
- values: 0: 0.0, z: 1.0
pitchBend
- values: 0: 0.0, z: 1.0
pressure
- values: 0: 1.5, z: 3.0

POLYPERC is a "simple polyphonic filtered decaying square wave". When this engine is selected, the SYNTH operaptor | takes up to 2 inputs (octave, note). For example |4C will play a C at the 4th octave (Midi scale).

octave
- values: 0-7
note
- values: A–G

TIMBER is a sample player engine and two scripts for norns. When this engine is selected, the SYNTH operator | takes up to 5 inputs (octave note sample level position). For example |4C1 will play the first sample and tune it a C at the 4th octave (Midi scale).

octave
- values: 0-7
note
- values: A–G
sample
- values: 0: 0, z: 35
level
- values: 0: 0.0, z: 1.0
position
- values: 0: start of sample z: end of sample

SYNTH PARAM

Each synth engine has numerous settings to modulate its sound profile. The SYNTH PARAM operator - are (param value) (except for FM7 see below) these 2 params are always required (along with a bang) to modulate a given parameter.

FM7 When this engine is selected the SYNTH PARAM operator - takes up to 3 inputs (param value voice). This particular engine allows for a complex combination of params. For example -5i1 sets the "Osc(illator) Amp(litude) Env(elope) Attack" to 5.14 seconds for voice 1. Load the included to fm7-demo.orca demo to see more params (be sure to select FM7 within the params menu first).

1: Osc Frequency Multiplier (Hz)
2: Osc Phase (radians)
3: Osc Amplitude (decibels)
4: Carrier Amplitude (decibels)
5: Osc Amp Env Attack (seconds)
6: Osc Amp Env Decay (seconds)
7: Osc Amp Env Sustain (decibels)
8: Osc Amp Env Release (seconds)
9: Osc1 Phase Mod Osc (decibels)
a: Osc2 Phase Mod Osc (decibels)
b: Osc3 Phase Mod Osc (decibels)
c: Osc4 Phase Mod Osc (decibels)
d: Osc5 Phase Mod Osc (decibels)
e: Osc6 Phase Mod Osc (decibels)

Passersby When this engine is selected the SYNTH PARAM operator - takes up to 2 inputs (param value). For example -51 sets the "Envelope Type " to "LPG". Load the included to passersby-demo.orca demo to see more params (be sure to select Passersby within the params menu first).

1: Amp
2: Attack (seconds)
3: Decay (seconds)
4: Drift
5: Envelope Type
- values 1: LPG, 2: Sustain
6: FM Low Amount
7: FM Low Ratio
8: FM High Amount
9: FM High Ratio
a: Glide (seconds)
b: LFO Frequency (Hz)
c: LFO Shape
- values 1: Triangle, 2: Ramp, 3: Square, 4: Random
d: LFO > Attack
e: LFO > Decay
f: LFO > FM Low
g: LFO > FM High
h: LFO > Frequency (Hz)
i: LFO > Peak
j: LFO > Reverb Mix
k: LFO > Wave Folds
l: LFO > Wave Shape
m: Peak (Hz)
n: Pitch Bend All
o: Pressure All
p: Reverb Mix
q: Timbre All
r: Wave Folds
s: Wave Shape

PolyPerc When this engine is selected the SYNTH PARAM operator - takes up to 2 inputs (param value). For example -3z sets the "Release" to 3200ms. Load the included to polyperc-demo.orca demo to see more params (be sure to select PolyPerc within the params menu first).

1: Pulse width (%)
2: Amp
3: Release (seconds)
4: Cutoff (Hz)
5: Gain
6: Pan
- values: 0: left, i: center, z: right

Timber When this engine is seleted the SYNTH PARAM operator - takes up to 3 inputs (param value sample). For example -811 sets the filter type to "high pass" for sample 1.

1: Amp env attack
2: Amp env decay
3: Amp env sustain
4: Amp env release
5: Detune cents
6: Stretch [percentage]
7: Filter freq
8: Filter resonance
9: Filter type
- values: 0: Low Pass, 1: High Pass
a: Quality
- values: 0: Nasty, 1: Low, 2: Medium, 3: High
b: Freq mod LFO 1
c: Freq mod LFO 2
d: Filter freq mod LFO 1
e: Filter freq mod LFO 2
f: Pan mod LFO 1
g: Pan mod LFO 2
h: Amp mod LFO 1
i: Amp mod LFO 2
j: Freq mod envelope
k: Filter freq mod envelope
l: Filter freq mod velocity
m: Filter freq mod pressure
n: Filter tracking
o: Pan mod envelope
p: Envelope attack
q: Envelope decay
r: Envelope sustain
s: Transpose
t: Stretch [length]
u: Stretch [bars]
- values: 0: 1/64, 1: 1/48, 2: 1/32, 3: 1/24, 4: 1/16,5: 1/12,6: 1/8,7: 1/6,8: 1/4,9: 1/3,a: 1/2,b: 2/3,c: 3/4,d: 1 bar
v: Pan
- values: 0: left, i: center, z: right
w: Amp
x: Envelope release
y: Start frame
z: End frame

MIDI

The MIDI IN operator & takes 1 input(channel).

This operator receives a MIDI note from a MIDI controller, based on the channel value (default is channel 1).

The CC IN operator ^ takes 1 input(channel).

This operator receives a MIDI CC message from a MIDI controller, based on the channel value (default is channel 1).

CROW

The CROW CV operator ~ takes up to 6 parameters (channel octave note attack release level).

channel
- values: 0: crow out 1 is 1v/Oct CV and out 2 is an AR envelope; 1: crow out 3 is 1v/Oct CV and out 2 is AR envelope.
octave
- values: 0-7
note
- values: A–G
attack
- values 0: 0s, z: 1.5s
release
- values: 0: 0s, z: 3s
level
- values: 0: 0V, z: 10V

For example ~04Chhz sets channel to value 0, plays a C4 note with a 750ms attack, 750ms release, at 10V.

The CROW JF II operator ] takes up to 4 parameters (channel octave note level). For this operator, channel can be set 0-5 and sets which channel the voice is playing from.

Tutorials and Demos

When Orca is installed, a number of tutorials (original) and demos are available to demonstrate basic and Norns specific functionalites.

Import/Export

This Norns port of Orca is capable of loading and exporting Orca .txt files. The creates interoperability for repositories such as Patchstorage.

Note change the file extension for files downloaded from Patchstorage to .txt. Upload the file to your Norns using SSH or FTP and use "> Load project" in the params menu to load a .txt file.

Conversely, you can also use this online coverter for either .txt files or even copying from other Orca's such as the web version. This converter will import/export .txt, .json. or .orca (Norns) filetypes, which can then be uploaded to your Norns via SSH/FTP.

Cut and paste the following into the online coverter to see how it works.

..Cc............
..3B6...........
...3A1..........
.R..4.O#AMAZING#
.tYt4XZ.........

Here's how you could upload a file via sftp — such as an exported .orca file — to Norns (replace <filename> with name of your file).

$ sftp [email protected]
$ put ./<filename>.orca /home/we/dust/data/orca/<filename>.orca

linusschrab / orca Goto Github PK

orca's Introduction