mirror of
https://github.com/deunix-educ/aventuriers-des-mots.git
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Make the five music tracks clearly distinct (0.5.2)
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Denis Defolie
+116
-26
@@ -138,7 +138,107 @@ def make_music(
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return normalise(folded, 0.5)
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def pluck(freq: float, duration: float, decay: float = 9.0) -> Signal:
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"""Note pincee courte et sautillante (harmoniques qui tombent vite)."""
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t = _time(duration)
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tone = np.sin(2 * np.pi * freq * t) + 0.5 * np.sin(2 * np.pi * freq * 2 * t) * np.exp(-decay * t)
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tone += 0.25 * np.sin(2 * np.pi * freq * 3 * t) * np.exp(-decay * 2 * t)
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return tone * np.exp(-decay * t) * np.minimum(t / 0.003, 1.0)
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def flow(freq: float, duration: float) -> Signal:
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"""Note ronde et liee, a attaque douce : pour les arpeges continus."""
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t = _time(duration)
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tone = np.sin(2 * np.pi * freq * t) + 0.15 * np.sin(2 * np.pi * freq * 2 * t)
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env = np.minimum(t / 0.03, 1.0) * np.exp(-2.2 * t)
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return tone * env
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def drone(freq: float, duration: float, tremolo_hz: float) -> Signal:
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"""Bourdon grave et lent, avec un battement d'amplitude."""
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t = _time(duration)
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tone = np.sin(2 * np.pi * freq * t) + 0.4 * np.sin(2 * np.pi * freq * 1.5 * t)
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wobble = 0.65 + 0.35 * np.sin(2 * np.pi * tremolo_hz * t)
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env = np.minimum(t / 3.0, 1.0) * np.minimum((duration - t) / 3.0, 1.0)
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return tone * wobble * np.clip(env, 0.0, 1.0)
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def fold_loop(track: Signal, body_seconds: float) -> Signal:
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"""Replie la queue sur le debut : la boucle ne claque pas."""
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length = int(body_seconds * SAMPLE_RATE)
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folded = track[:length].copy()
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overflow = track[length:]
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folded[: len(overflow)] += overflow
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return folded
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def make_arpeggio(
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chords: list[list[str]],
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pattern: list[int],
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step: float,
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voice: str,
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bass: bool,
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pad_gain: float,
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) -> Signal:
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"""Motif d'arpege repete sur chaque accord ; `pattern` indexe l'accord."""
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steps_per_chord = len(pattern)
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chord_seconds = steps_per_chord * step
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body = chord_seconds * len(chords)
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track = np.zeros(int((body + 3.0) * SAMPLE_RATE))
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for index, chord in enumerate(chords):
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start = index * chord_seconds
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if pad_gain > 0:
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for note in chord:
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place(track, pad(hz(note), chord_seconds + 1.0), start, gain=pad_gain)
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if bass:
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place(track, pluck(hz(chord[0]) / 2, 1.2, decay=4.0), start, gain=0.9)
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for position, chord_index in enumerate(pattern):
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note = chord[chord_index % len(chord)]
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octave_up = 2.0 if chord_index >= len(chord) else 1.0
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freq = hz(note) * 2.0 * octave_up
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sound = pluck(freq, 0.6) if voice == "pluck" else flow(freq, 1.2)
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place(track, sound, start + position * step, gain=0.5)
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return normalise(fold_loop(track, body), 0.5)
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def make_drone_music(seed: int) -> Signal:
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"""Marais : bourdon grave qui respire et rares notes de cloche creuses."""
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rng = np.random.default_rng(seed)
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body = 40.0
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track = np.zeros(int((body + 4.0) * SAMPLE_RATE))
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place(track, drone(hz("A1"), body + 4.0, 0.11), 0.0, gain=0.8)
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place(track, drone(hz("E2"), body + 4.0, 0.17), 0.0, gain=0.5)
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for start in np.arange(2.0, body - 3.0, 5.0):
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note = ["A3", "C4", "E4", "G3"][int(rng.integers(4))]
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place(track, bell(hz(note), 3.5, decay=1.6, brightness=0.15), float(start), gain=0.5)
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return normalise(fold_loop(track, body), 0.5)
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def make_music_box(seed: int) -> Signal:
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"""Nuit : boite a musique aigue en 3 temps, tres lente, sur un lit grave."""
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rng = np.random.default_rng(seed)
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scale = ["C5", "D5", "E5", "G5", "A5", "C6", "E6"]
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beat = 0.95
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bars = 16
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body = bars * 3 * beat
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track = np.zeros(int((body + 3.0) * SAMPLE_RATE))
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for bar in range(bars):
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root = ["C3", "A2", "F2", "G2"][bar % 4]
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place(track, pad(hz(root), 3 * beat + 1.0, attack=0.8), bar * 3 * beat, gain=0.3)
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for count in range(3):
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if count == 0 or rng.random() < 0.6:
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note = scale[int(rng.integers(len(scale)))]
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place(
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track,
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bell(hz(note), 1.8, decay=3.2, brightness=0.7),
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(bar * 3 + count) * beat,
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gain=0.55,
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)
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return normalise(fold_loop(track, body), 0.5)
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def make_all_music() -> dict[str, Signal]:
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"""Cinq ambiances nettement differentes (timbre, rythme, registre)."""
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forest = make_music(
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chords=[["C3", "G3", "E4"], ["A2", "E3", "C4"], ["F2", "C3", "A3"], ["G2", "D3", "B3"]] * 2,
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melody_scale=["C5", "D5", "E5", "G5", "A5", "C6"],
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@@ -146,34 +246,24 @@ def make_all_music() -> dict[str, Signal]:
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seed=11,
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melody_density=0.45,
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)
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marsh = make_music(
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chords=[["A2", "E3", "C4"], ["F2", "C3", "A3"], ["D3", "A3", "F4"], ["E3", "B3", "G4"]] * 2,
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melody_scale=["A4", "C5", "D5", "E5", "G5"],
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seconds_per_chord=5.0,
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seed=23,
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melody_density=0.35,
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marsh = make_drone_music(seed=23)
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meadow = make_arpeggio( # prairie : pizzicati allegres, basse sur le temps
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chords=[["G3", "B3", "D4"], ["E3", "G3", "B3"], ["C3", "E3", "G3"], ["D3", "F#3", "A3"]] * 2,
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pattern=[0, 1, 2, 1, 0, 1, 2, 3],
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step=0.25,
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voice="pluck",
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bass=True,
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pad_gain=0.0,
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)
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meadow = make_music( # prairie : majeur lumineux, un peu plus vif
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chords=[["G2", "D3", "B3"], ["E2", "B2", "G3"], ["C3", "G3", "E4"], ["D3", "A3", "F#4"]] * 2,
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melody_scale=["G4", "A4", "B4", "D5", "E5", "G5"],
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seconds_per_chord=3.5,
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seed=37,
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melody_density=0.55,
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)
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river = make_music( # riviere : mode dorien, melodie qui coule
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chords=[["D3", "A3", "F4"], ["G2", "D3", "B3"], ["C3", "G3", "E4"], ["A2", "E3", "C4"]] * 2,
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melody_scale=["D5", "E5", "F5", "A5", "C6", "A4"],
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seconds_per_chord=3.0,
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seed=41,
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melody_density=0.65,
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)
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night = make_music( # nuit : berceuse lente et rare
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chords=[["F2", "C3", "A3"], ["D3", "A3", "E4"], ["Bb2", "F3", "D4"], ["C3", "G3", "E4"]] * 2,
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melody_scale=["F5", "G5", "A5", "C6", "E5"],
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seconds_per_chord=6.0,
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seed=53,
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melody_density=0.25,
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river = make_arpeggio( # riviere : arpege continu, lie, qui monte et descend
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chords=[["D3", "A3", "F4"], ["G3", "D4", "B4"], ["C3", "G3", "E4"], ["A2", "E3", "C4"]] * 2,
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pattern=[0, 1, 2, 3, 4, 3, 2, 1],
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step=0.18,
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voice="flow",
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bass=False,
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pad_gain=0.12,
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)
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night = make_music_box(seed=53)
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return {"forest": forest, "marsh": marsh, "meadow": meadow, "river": river, "night": night}
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