/blend.nim at main

import yue, std/[sugar]

const GAIN_NORMAL = 0.22

var osc: OscFn = (f, t: float) => 0.0

proc p*(len, octave, step, vol: float = 1): Note =
  ## Note helper constructor
  (len, freq(octave, step), vol, osc)

osc = (f, t: float) => osc_piano(f, t) * GAIN_NORMAL

let intro = [
    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(6, 4, 2),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(3, 4, 0),

    p(1, 2, 11),
    p(1, 3, 3),
    p(1, 3, 6),
    p(3, 3, 10),

    p(1, 2, 8),
    p(1, 3, 0),
    p(1, 3, 3),
    p(8, 3, 7),
]

let outro = [
    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(1, 4, 2),
    p(1, 4, 3),
    p(1, 4, 7),
    p(2, 4, 8),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(1, 4, 0),
    p(1, 4, 1),
    p(1, 4, 5),
    p(2, 4, 8),

    p(1, 2, 11),
    p(1, 3, 3),
    p(1, 3, 6),
    p(1, 3, 10),
    p(1.5, 3, 11),
    p(1.5, 4, 3),
    p(3, 4, 8),

    p(1.5, 2, 8),
    p(1.5, 3, 0),
    p(2, 3, 3),
    p(16, 3, 7, 2),
]

let melody = [
    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(1, 4, 2),
    p(1, 4, 3),
    p(1, 4, 7),
    p(2, 4, 8),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(1, 4, 0),
    p(1, 4, 1),
    p(1, 4, 5),
    p(2, 4, 8),

    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(1, 4, 2),
    p(1, 4, 3),
    p(1, 4, 10),
    p(2, 4, 3),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(1, 4, 0),
    p(1, 4, 10),
    p(1, 4, 8),
    p(2, 4, 10),


    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(1, 4, 2),
    p(1, 4, 3),
    p(1, 4, 7),
    p(2, 4, 8),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(1, 4, 0),
    p(1, 4, 1),
    p(1, 4, 5),
    p(2, 4, 1),

    p(1, 3, 3),
    p(1, 3, 7),
    p(1, 3, 10),
    p(1, 4, 2),
    p(1, 4, 3),
    p(1, 4, 10),
    p(1, 4, 8),
    p(1, 4, 7),

    p(1, 3, 1),
    p(1, 3, 5),
    p(1, 3, 8),
    p(1, 4, 0),
    p(1, 4, 10),
    p(1, 4, 8),
    p(2, 4, 10),
]

osc = (f, t: float) => osc_weird_pluck(f, t) * GAIN_NORMAL

let melody2 = [
    p(1, 0, 0),
    p(1, 5, 10),
    p(1, 5, 8),
    p(1, 5, 7),
    p(1, 5, 8),
    p(3, 5, 7, 2),

    p(1, 5, 3),
    p(1, 4, 10),
    p(6, 5, 1, 2),

    p(1/2, 5, 0, 2),
    p(1/2, 5, 1, 2),
    p(3, 5, 3, 2),
    p(1/2, 5, 10, 2),
    p(7/2, 5, 3, 2),

    p(8, 0, 0),

    p(1, 0, 0),
    p(1, 5, 3),
    p(1, 5, 10),
    p(1, 5, 10),
    p(4/3, 5, 10),
    p(4/3, 5, 8),
    p(4/3, 5, 7),

    p(1, 0, 0),
    p(1, 5, 1),
    p(1, 5, 8),
    p(1, 5, 8),
    p(4/3, 5, 8),
    p(4/3, 5, 8),
    p(4/3, 5, 10),

    p(8, 0, 0),

    p(1, 0, 0),
    p(5, 5, 3, 2),
    p(2, 5, 10, 2),
]

let melody3 = [
    p(1, 0, 0),
    p(1, 5, 10),
    p(1/2, 5, 8, 2/3),
    p(1/2, 5, 7, 2/3),
    p(1/4, 5, 8, 1/2),
    p(1/4, 5, 7, 1/2),
    p(1/4, 5, 8, 1/2),
    p(1/4, 5, 7, 1/2),
    p(1, 5, 8),
    p(3, 5, 7, 2),

    p(1, 5, 3),
    p(1, 4, 10),
    p(1, 5, 1),
    p(5, 5, 7, 2),

    p(1/2, 5, 7),
    p(1/2, 5, 10),
    p(1/4, 5, 7),
    p(1/4, 5, 10),
    p(1/4, 5, 7),
    p(1/4, 5, 10),
    p(1, 6, 3),
    p(2, 5, 3, 2),
    p(1/2, 6, 3),
    p(5/2, 5, 3, 2),

    p(1/2, 5, 10),
    p(1/2, 5, 8),
    p(1/2, 5, 7),
    p(1/2, 5, 8),
    p(1/2, 5, 7),
    p(1/2, 5, 3),
    p(1/2, 4, 10),
    p(1/2, 5, 1),
    p(1/2, 5, 0),
    p(1/2, 4, 10),
    p(1/2, 4, 8),
    p(1/2, 4, 10),
    p(1/2, 5, 3),
    p(1/2, 5, 7),
    p(1/2, 5, 3),
    p(1/2, 5, 10),

    p(4/3, 5, 7),
    p(4/3, 6, 3),
    p(4/3, 6, 3),
    p(4/3, 6, 2),
    p(4/3, 5, 10),
    p(4/3, 5, 7),

    p(3, 5, 5),
    p(2, 5, 7),
    p(2, 5, 8),
    p(1, 6, 1),

    p(1, 5, 3),
    p(1, 5, 5),
    p(2, 5, 7),
    p(1, 5, 3),
    p(1, 5, 8),
    p(2, 5, 10),

    p(3/2, 6, 0),
    p(3/2, 6, 1),
    p(5, 6, 3, 2),
]

# clip length to 1 second
osc = (f, t: float) => (if t > 1: 0.0 else:
  (osc_saw(f, t) * GAIN_NORMAL * 0.06) + (osc_pulse(f, t) * GAIN_NORMAL * 0.3))

let bass = [
    p(1, 1, 3),
    p(1, 1, 10),
    p(1, 1, 1),
    p(1, 1, 8),
    p(1, 1, 3),
    p(1, 2, 3),
    p(1, 1, 1),
    p(1, 1, 10),
]

from std/algorithm import sort

# Process all lists of notes
var music: seq[ProcessedNote] = @[]
music.process(intro, 0, 4)
music.process(melody, 8, 4)
music.process(melody, 24, 4)
music.process(bass, 24)
music.process(bass, 32)
music.process(melody, 40, 4)
music.process(melody2, 40, 4)
music.process(bass, 40)
music.process(bass, 48)
music.process(melody, 56, 4)
music.process(melody3, 56, 4)
music.process(bass, 56)
music.process(bass, 64)
music.process(outro, 72, 4)
music.sortByStart()

# Number of times to sample each second
const bitrate = 44100

# Print out music encoded in s32 to standard output
for i in (0 * bitrate ..< 84 * bitrate):
  let bytes = cast[array[4, uint8]](music.at(i / bitrate))
  doAssert 4 == stdout.writeBytes(bytes, 0, 4)