Compiles tracker-style music DSL to a javascript expression. Written in Haskell.
cabal run song.js example/*
Creates a file called song.js, copy and paste into this bytebeat site and render at the appropriate sample rate (the example song is compiled to 32kHz).
- Text tracker format:
%samples 44100
%mix 1.5 1.4 1.8 1.8 1.8 1.0 1.0
%master 0.35
# epic song
=
D#4 A0.15 S10.0 W100 H3 Z1.0 0.1 sn
E-4 A0.25 S00.0
.
A-4
.
D-5
---
- Sine, Square, Saw waveforms (combinable)
- Noise
- Layering harmonics
- Harmonic amplitude modulation
- Fequency modulation
- Vibrato, pitch slide
- Channel mixing
- Key transposition
- Reverb
- Any oscillator can use sine, square, or saw.
Each channel is a sequence of steps, empty lines divide the channels.
A float-- amplitudeD float-- dampen amplitude per step (can be negative)S float-- add value to frequency per step (can be negative)H int-- number of harmonicsV float float waveform-- vibrato frequency/depth/waveformZ float float waveform-- frequency modulation, first argument is ratio to current playing frequency to modulate at, then depth and waveform.
%master float-- scale master volume%mix float ...-- scale each channel volume%samples int-- sample rate%key int-- transpose song by half-steps%reverb bit ...-- toggle reverb per channel
- Format is pretty contrived. Had I known the kind of tricks I could pull regarding
windowin the beginning it'd be a lot cleaner, and the compiled example song would be a lot smaller than 74kB (which is surprisingly AFTER some egregious compression tricks)! - Pulse modulation isn't implemented correctly, use at your discretion.
- Parser is incomplete (avoid trailing spaces 😬).
- Scripting the music is TEEDDDIIOOUUSSS.
- Be careful when debugging your song in 22kHz if you intend to render at 44kHz, the noise will include the higher frequencies.
- No BPM config (yet).
- No config to control reverberation (yet).
- ***This was mostly written on a per-need basis so I could finish the example song by the BotB Spring Tracks IX deadline.