// kawaii-future-bass.sym
// Symphra syntax draft 0.1

project {
  seed 20260809
  sample_rate 48khz
  output stereo
}

song "Kawaii Future Bass" {
  tempo 150bpm
  meter 4/4
  key C major

  // ─────────────────────────────────────────────
  // Instruments
  // ─────────────────────────────────────────────

  instrument chord_saw = synth supersaw {
    voices 5
    detune 0.35
    spread 0.80

    envelope {
      attack  4ms
      decay   200ms
      sustain 0.50
      release 150ms
    }
  }

  instrument sub_sine = synth sine {
    envelope {
      attack  5ms
      decay   100ms
      sustain 0.90
      release 80ms
    }
  }

  instrument sub_triangle = synth triangle {
    envelope {
      attack  5ms
      decay   100ms
      sustain 0.90
      release 80ms
    }
  }

  instrument music_box = soundfont {
    preset "gm_music_box"
  }

  instrument voice_numbers = sampler {
    pack "numbers"
  }

  instrument tr909 = drum_machine {
    bank "RolandTR909"
  }

  // ─────────────────────────────────────────────
  // Reusable rhythms
  // ─────────────────────────────────────────────

  rhythm chord_stabs resolution 1/8 {
    hit rest hit hit rest hit rest hit
  }

  rhythm bass_pulse resolution 1/8 {
    hit rest rest hit rest rest hit rest
  }

  rhythm kick_pattern resolution 1/8 {
    hit rest rest hit rest rest hit rest
  }

  rhythm clap_pattern resolution 1/8 {
    rest rest hit rest rest rest hit rest
  }

  // ─────────────────────────────────────────────
  // Harmonic material
  // ─────────────────────────────────────────────

  pattern progression = sequence {
    chord [F3 A3 C4 E4 G4] for 1bar
    chord [G3 B3 D4 F4 A4] for 1bar
    chord [E3 G3 B3 D4 G4] for 1bar
    chord [A3 C4 E4 G4 B4] for 1bar
  }

  pattern bass_roots = sequence {
    note F1 for 1bar
    note G1 for 1bar
    note E1 for 1bar
    note A1 for 1bar
  }

  pattern arpeggio = steps 1/8 {
    degree 0 octave 5
    degree 2 octave 5
    degree 4 octave 5
    degree 7 octave 5
    degree 9 octave 5
    choose {
      degree 12 octave 5 weight 1
      degree 11 octave 5 weight 1
    }
    degree 9 octave 5
    degree 4 octave 5
  }

  // ─────────────────────────────────────────────
  // Tracks
  // ─────────────────────────────────────────────

  track chords role harmony {
    instrument chord_saw
    volume -5.2db

    play progression
      |> trigger_with chord_stabs
      |> gate 95%

    automate filter.lowpass.cutoff {
      lfo sine {
        range 600hz..2800hz
        rate 2cycles/bar
      }
    }

    effect filter.lowpass {
      resonance 0.40
    }

    effect reverb {
      mix 0.40
      size 0.80
    }
  }

  track bass role bass {
    volume -1.4db

    layer {
      use sub_sine {
        play bass_roots
          |> trigger_with bass_pulse
          |> gate 90%
      }

      use sub_triangle {
        play bass_roots
          |> trigger_with bass_pulse
          |> transpose +12st
          |> gain 0.30
          |> gate 90%
      }
    }
  }

  track sparkle role harmony {
    instrument music_box
    volume -6db

    layer {
      play arpeggio
        |> repeat 4
        |> chance 15% {
             transpose +12st
           }
        |> pan -55%
    }

    layer {
      play arpeggio
        |> reverse
        |> repeat 4
        |> chance 15% {
             transpose +12st
           }
        |> pan +55%
    }

    effect reverb {
      mix 0.60
    }

    effect delay {
      time 1/4
      feedback 0.25
    }
  }

  track voice_chop role effect {
    instrument voice_numbers
    volume -0.9db

    pattern phrase = steps 1/8 {
      rest
      rest

      choose {
        sample 1
        sample 3
      }

      rest
      rest

      choose {
        sample 2 weight 3

        sequence weight 1 {
          sample 4
          sample 7
        }
      }

      rest
      rest
    }

    play phrase
      |> repeat 4
      |> alternate {
           speed 1.50
           speed 1.80
         }
      |> chance 40% {
           retrigger 2
         }
      |> pan alternate(30%, 70%)

    effect delay {
      mix 0.40
      time 1/4
    }

    effect reverb {
      mix 0.50
    }
  }

  track kick role drums {
    instrument tr909
    volume -0.9db

    play drum "bd" with kick_pattern
      |> repeat 4

    effect reverb {
      mix 0.10
    }
  }

  track clap role drums {
    instrument tr909
    volume -0.9db

    play drum "cp" with clap_pattern
      |> repeat 4

    effect reverb {
      mix 0.10
    }
  }

  track hi_hat role drums {
    instrument tr909
    volume -5.2db

    pattern hats = steps 1/16 {
      drum "hh" velocity 0.55
      drum "hh" velocity 0.35
      drum "hh" velocity 0.55
      drum "hh" velocity 0.35

      drum "hh" velocity 0.55
      drum "hh" velocity 0.35
      drum "hh" velocity 0.55
      drum "hh" velocity 0.35

      drum "hh" velocity 0.55
      drum "hh" velocity 0.35
      drum "hh" velocity 0.55
      drum "hh" velocity 0.35

      drum "hh" velocity 0.55
      drum "hh" velocity 0.35
      drum "hh" velocity 0.55
      drum "hh" velocity 0.35
    }

    play hats
      |> repeat 4
      |> choose_sample 0..3
      |> chance 15% {
           speed 1.50
         }
  }

  track crash role drums {
    instrument tr909
    volume -9.1db

    at 1:1 play drum "cr"

    effect reverb {
      mix 0.60
    }
  }

  // ─────────────────────────────────────────────
  // Arrangement
  // ─────────────────────────────────────────────

  section phrase bars 4 {
    parallel exact {
      play track chords
      play track bass
      play track sparkle
      play track voice_chop
      play track kick
      play track clap
      play track hi_hat
      play track crash
    }
  }

  arrangement {
    play phrase
  }

  master {
    limiter {
      ceiling -0.3db
    }
  }
}