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TUTORIAL.md

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Tutorial

If this is your first time trying out Orca, watch this introduction video. If you're looking for additional examples, visit this repository.

General

Pilot

Pilot is a minimalist synth software designed to work via UDP, and to quickly get started with Orca. This requires no setup, as long as both applications are open, they should be able to communicate with each other.

  • Launch Orca & Pilot.
  • In Orca, make sure that UDP is pointing to port 49161.
  • Bang something like ;03Cff to play a note.
  • Bang something like ;revff to add reverb.

Ableton Live

To send Midi notes to Ableton Live instruments, bang the Midi operator :, like :03C to send to Channel 1, Octave 3, Note C. Have a look at midi.orca to see it in action.

  • Launch Ableton Live.
  • Create a new midi instrument track.
  • Select IAC Driver(Bus 1)(OSX), or LoopMidi(Windows), in the instrument's inputs dropdown.
  • Activate the In toggle, on the instrument track.

SonicPi

To send OSC messages to SonicPi, select port 4560. SonicPi listens to the address defined in sync, to send to the live_loop, bang the OSC node =, like =a. If you need help, visit the SonicPi x Orca forum.

live_loop :drum do
  use_real_time
  sync "/osc*/a"
  sample :bd_haus, rate: 1
end

Bitwig [Linux and JACK]

The following is taken from this page: https://answers.bitwig.com/questions/1218/how-do-i-get-midi-inout-of-bws-on-linux

  • Quit Bitwig if running.
  • Start qjacktl.
  • Go to Setup > Settings > Parameters and set MIDI Driver to "none" (this turns off jack-midi)
  • Go to Setup > Misc and check "Enable ALSA Sequencer Support" (if not enabled)
  • Stop Jack if running and quit gjackctl
  • Run sudo modprobe snd_virmidi midi_devs=1 (to enable virtual midi with one device which is easier to understand for now)
  • Start qjacktl
  • Start jack
  • Open Connections: Connect device on left "0: QuNexus MIDI 1" (as an example) to "0:VirMIDI 5-0"
  • Open Bitwig
  • Under Options > Preferences > Controllers click "Add controller manually"
  • Choose "Generic MIDI Keyboard"
  • Once it appears as an input choose "Virtual Raw MIDI/1"

VCV Rack

  • Start VCV Rack
  • Add a "VCV MIDI-CV" module to your rack
  • Set the first parameter, MIDI Driver, to your local loopback driver
    • Windows: Start loopMIDI, be sure to create at least one device, then select "loopMIDI" as the parameter
    • Linux: Use "ALSA" (the widely supported Linux sound architecture)
  • Set the second parameter to the MIDI interface
    • Windows: Use the loopMIDI device you created
    • Linux: Select the default "MIDI Through" device (available by default on most ALSA configurations)
  • Start Orca
  • Use the Hotkey Ctrl+Period to cycle through MIDI output devices until you see your device in the lower-right corner
  • Bang a MIDI command to VCV: :03c88 to get a note and gate trigger from MIDI-CV

FAQS

Why does placement of V matter?

Orca operates linearly from the top-left, to the bottom-right, operators are executed in that sequence, and so the variables stored at the top, can be overwritten by the variables declared at the bottom.

Why is orca not making any sound?

Orca is not a synthetizer, it is meant to control audio & visual software, or hardware. Orca will never include domain specific operators to generate music or to create pictures. It is designed to be as generic as possible.

Golf

Modulo

Will output the modulo of 6 % 4.

1X.
6I4

Uppercase

Will output uppercase C.

cA1.
.dAZ

Lowercase

Will output lowercase C.

H..
CM1

Not Null

Will bang if L free input is not null.

.L0.
..F0