Hello World in Velato
Velato is a music-based programming language that accepts a MIDI file as input. This is my hello world.
Dependencies
Velato compiler
The compiler is written in C# and I couldn't find a recent pre-compiled binary, so I needed a way to compile it myself. I developed this on macOS, so I used Mono from Homebrew:
brew install mono
Mono ships with the msbuild
program, which we can use to compile the Velato
compiler:
msbuild Rottytooth.Esolang.Velato/Rottytooth.Esolang.Velato.csproj /p:Configuration=Release
This will put the compiled output in the Rottytooth.Esolang.Velato/bin/Release
directory. The Velato.exe
and NAudio.dll
files are what we're interested in.
They have been copied into the vendor
directory of this repo for convenience.
LilyPond
Since Velato takes MIDI as its input, I needed a way to produce a MIDI file. LilyPond is a "music engraving program" whose focus is producing high quality sheet music, but will also output MIDI.
Note: I used LilyPond version 2.19.x for this, which is currently pre-release. There is a Homebrew package, via casks, that is 2.18.x, which doesn't produce a midi that Velato accepts.
Building & executing
The general flow is:
lilypond hello-world.ly
mono vendor/Velato.exe hello-world.midi
mono hello-world.mid.exe
The included build
script is a convenience for steps 1 & 2.