Offline rendering

An arrangement plays scenes in order. Render it by name, or just a passage of it:

// A finished piece: scenes in order, each for a length.
// Render with:  niminal render examples/song.nml song --out song.wav
// ...or just a passage:  niminal render examples/song.nml song --from "bar 5" --to "bar 9" --out passage.wav
config { channels: stereo }
tempo 110bpm

kit drums = "drums"
bus space: stereo

instr pluck(freq: hz, bright: 0..1 = 0.5) {
  voice = osc(saw, freq).lpf(cutoff: freq * (2 + bright * 6), res: 0.25) * env[0 2ms 1 400ms.exp 0]
  out = voice.pan(azimuth: 0deg)
  space += out.gain(-12db)
}

track hall { out = space.reverb(room: 0.8, damp: 0.4).gain(0.8) }
track beat { instrument = drums }
track hats { instrument = drums(gain: -8db) }
track bass { instrument = pluck(bright: 0.2) }
track lead { instrument = pluck(bright: 0.7) }

bassline = [c2 ~ c2 eb2 ~ g1 bb1 ~]
groove   = [kick ~ ~ kick  snare ~ kick ~  kick ~ ~ kick  snare ~ ~ snare]
tune     = [c4 e4 g4 b4].every(2, it.reverse)

scene intro  { bass: bassline }
scene verse  { bass: bassline, beat: groove, hats: [hat hat hat hat hat hat hat hat] }
scene chorus { bass: bassline.transpose(+5st), beat: groove, hats: [hat hat hat hat hat hat hat hat], lead: tune }
scene outro  { bass: bassline }

arrangement song {
  sections: [intro.over(2 bars) verse.over(4 bars) chorus.over(4 bars) verse.over(4 bars) outro.over(2 bars)]
}

niminal render examples/song.nml song --out song.wav
niminal render examples/song.nml song --from "bar 5" --to "bar 9" --out passage.wav