darylwalsh / demo-elixir-reloading-music Goto Github PK

The code in this repository demonstrates how to use Elixir "hot-reloading" feature, together with MIDI events generation.

Youtube link:

• https://www.youtube.com/watch?v=_VgcUatTilU&feature=youtu.be&t=2m2s

Slides:

• https://speakerdeck.com/thbar/elixir-hot-reloading-and-midi-events-generation

In short:

• reloading.exs monitors the file system and hot-reloads music.exs
• music.exs:
  • relies on GenServer to ensure the "midi player" will keep state between code reloads
  • creates a "tick" every 50 milliseconds
  • uses portmidi to send MIDI events to Renoise

• Install Renoise demo and load Song.xrns
• Run the code:

brew install portmidi
mix deps.get
mix run --no-halt reloading.exs

• Edit music.exs to play around