georgios
c08e22c873
Replaced the atonal note-burst loops with an actual tune - a soft, public-domain arrangement of Twinkle Twinkle Little Star in C (fits the star lanes), scheduled as proper notes with durations over an oom-pah bass line: - title: slow sine lullaby (~100 bpm) - play: bouncier triangle version with a brighter octave-up B section - verified the schedule spells out C C G G A A G F F E E D D C ... - no square waves or noise in the music; soft volumes
294 lines
12 KiB
Python
294 lines
12 KiB
Python
"""Procedural chiptune SFX & music synthesis. No audio files - everything is
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generated into PCM buffers at startup."""
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import array
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import math
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import random
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import pygame
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SR = 22050 # sample rate
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# note -> frequency
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NOTE = {
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"C": 261.63, "C#": 277.18, "D": 293.66, "D#": 311.13, "E": 329.63,
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"F": 349.23, "F#": 369.99, "G": 392.00, "G#": 415.30, "A": 440.00,
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"A#": 466.16, "B": 493.88,
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}
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def freq(note, octave):
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return NOTE[note] * (2 ** (octave - 4))
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class Synth:
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"""Builds Sound objects through pygame.mixer (falls back silently if no audio)."""
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def __init__(self):
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self.ok = False
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self.sounds = {}
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try:
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if not pygame.mixer.get_init():
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pygame.mixer.init(SR, -16, 1, 512)
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self.ok = True
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except Exception:
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return
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self._rng = random.Random(7)
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self._build_all()
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self.music_channel = pygame.mixer.Channel(0)
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self.sfx_channels = [pygame.mixer.Channel(i) for i in range(1, 6)]
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self._ch_i = 0
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# ---- sample builders -------------------------------------------------
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@staticmethod
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def _env(n, attack=0.005, release=0.25):
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"""Apply simple AD envelope to n samples."""
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a = max(1, int(attack * SR))
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r = max(1, int(release * SR))
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out = []
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for i in range(n):
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if i < a:
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v = i / a
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elif i > n - r:
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v = max(0.0, (n - i) / r)
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else:
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v = 1.0
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out.append(v)
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return out
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@staticmethod
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def _wave(shape, phase, duty=0.5):
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p = phase % 1.0
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if shape == "square":
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return 1.0 if p < duty else -1.0
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if shape == "saw":
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return 2.0 * p - 1.0
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if shape == "tri":
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return 4.0 * abs(p - 0.5) - 1.0
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if shape == "noise":
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return 1.0
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return math.sin(2 * math.pi * p)
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def tone(self, f, dur, vol=0.5, shape="square", slide=0.0, duty=0.5):
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"""slide: freq multiplier change over duration (e.g. 0.7 sweeps down)."""
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n = max(1, int(SR * dur))
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env = self._env(n)
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out = array.array("h")
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phase = 0.0
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for i in range(n):
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t = i / n
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ff = f * (1.0 + (slide - 1.0) * t)
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phase += ff / SR
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v = self._wave(shape, phase, duty) * env[i] * vol
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out.append(int(max(-1.0, min(1.0, v)) * 32000))
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return out
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def noise(self, dur, vol=0.35, lp=0.3, slide=1.0):
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"""Filtered-ish noise burst. lp = lowpass smoothing (0..1)."""
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n = max(1, int(SR * dur))
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env = self._env(n)
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out = array.array("h")
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acc = 0.0
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for i in range(n):
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acc += (self._rng.uniform(-1, 1) - acc) * lp
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v = acc * env[i] * vol
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out.append(int(max(-1.0, min(1.0, v)) * 32000))
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return out
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@staticmethod
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def _mix(*arrays):
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ln = max(len(a) for a in arrays)
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acc = [0] * ln
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for a in arrays:
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for i, v in enumerate(a):
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acc[i] += v
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peak = max(1, max(abs(v) for v in acc))
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scale = 32000.0 / peak if peak > 32000 else 1.0
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return array.array("h", (int(v * scale) for v in acc))
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def _snd(self, name, samples):
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try:
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self.sounds[name] = pygame.mixer.Sound(buffer=samples.tobytes())
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except Exception:
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self.sounds[name] = None
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# ---- all effects -----------------------------------------------------
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def _build_all(self):
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self._snd("flipL", self.tone(180, 0.07, 0.4, "square", slide=0.7))
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self._snd("flipR", self.tone(210, 0.07, 0.4, "square", slide=0.7))
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self._snd("wall", self.tone(140, 0.05, 0.09, "tri"))
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self._snd("launch", self._mix(
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self.noise(0.28, 0.5, lp=0.25),
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self.tone(160, 0.3, 0.35, "saw", slide=1.9)))
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self._snd("drain", self.tone(500, 0.55, 0.5, "saw", slide=0.18))
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self._snd("tick", self.tone(2400, 0.015, 0.12, "square"))
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# bumpers: pitched by combo (choose at play time via 'bump' variants)
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for i in range(12):
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f = 300 * (1.08 ** i)
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self._snd("bump%d" % i, self.tone(f, 0.16, 0.5, "square", slide=0.85))
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self._snd("sling", self._mix(
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self.tone(700, 0.05, 0.4, "square", slide=0.5),
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self.tone(350, 0.09, 0.4, "saw", slide=0.8)))
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self._snd("star", self.tone(880, 0.12, 0.42, "tri", slide=1.5))
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self._snd("starLit", self._mix(
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self.tone(660, 0.09, 0.4, "tri"), self.tone(990, 0.16, 0.4, "tri")))
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# arpeggio helpers
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def arp(notes, step=0.11, vol=0.42):
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parts = []
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for i, (nm, oc) in enumerate(notes):
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parts.append(self.tone(freq(nm, oc), step * 1.6, vol, "square", slide=1.1))
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if i < len(notes) - 1:
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parts.append(array.array("h", [0]) * int(SR * step * 0.55))
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return self._mix(*parts) if parts else array.array("h", [0])
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self._snd("fever", arp([("C", 5), ("E", 5), ("G", 5), ("C", 6), ("E", 6), ("G", 6)], 0.09, 0.45))
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self._snd("extra", arp([("C", 4), ("C", 5), ("G", 5), ("E", 5), ("C", 6)], 0.13, 0.5))
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self._snd("milestone", arp([("C", 5), ("E", 5), ("A", 5), ("E", 6)], 0.1, 0.45))
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self._snd("combo", arp([("A", 4), ("C", 5), ("E", 5)], 0.06, 0.35))
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def seq(note_spec, step=0.13, vol=0.4, shape="square"):
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parts = []
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for nm, oc in note_spec:
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parts.append(self.tone(freq(nm, oc), step * 1.35, vol, shape))
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return self._mix(*parts)
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self._snd("gameover", seq(
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[("E", 5), ("C", 5), ("A", 4), ("F", 4), ("C", 4)], 0.24, 0.4, "saw"))
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self._snd("start", seq(
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[("C", 4), ("E", 4), ("G", 4), ("C", 5), ("E", 5), ("G", 5)], 0.09, 0.45))
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self._snd("hi", seq([("C", 6), ("E", 6), ("G", 6), ("C", 7)], 0.08, 0.3, "tri"))
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self._build_music()
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# ------------------------------------------------------------------ music
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# A real melody! Public-domain "Twinkle Twinkle Little Star" (Mozart's
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# variations), arranged as a gentle 4-bar loop with a soft bass line.
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# Fits the star-lane theme; unmistakably a tune.
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# Each bar is 8 eighth-note slots; attacks are (note, n_slots, octave).
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MELODY = [
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# Twinkle, twinkle, little star
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[("C", 1, 4), ("C", 1, 4), ("G", 1, 4), ("G", 1, 4),
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("A", 1, 4), ("A", 1, 4), ("G", 2, 4)],
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# how I wonder what you are
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[("F", 1, 4), ("F", 1, 4), ("E", 1, 4), ("E", 1, 4),
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("D", 1, 4), ("D", 1, 4), ("C", 2, 4)],
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# up above the world so high / like a diamond in the sky
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[("G", 1, 4), ("G", 1, 4), ("F", 1, 4), ("F", 1, 4),
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("E", 1, 4), ("E", 1, 4), ("D", 2, 4)],
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[("G", 1, 4), ("G", 1, 4), ("F", 1, 4), ("F", 1, 4),
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("E", 1, 4), ("E", 1, 4), ("D", 2, 4)],
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]
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BASS_ROOTS = ["C", "F", "C", "C"] # harmony for each of the 4 bars
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def _music_buffer(self, tracks, total_s):
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"""Render time-placed notes (start_s, note, octave, dur_s, vol, shape)
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into one softly-mixed, normalized buffer."""
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n = int(SR * total_s)
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buf = [0] * n
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for (t0, nm, oc, dur, vol, shape) in tracks:
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samples = self.tone(freq(nm, oc), dur, vol, shape)
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off = int(SR * t0)
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for i, v in enumerate(samples):
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j = off + i
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if j < n:
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buf[j] = max(-32767, min(32767, buf[j] + v))
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peak = max(1, max(abs(v) for v in buf))
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sc = 28000.0 / peak if peak > 28000 else 1.0
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return array.array("h", (int(v * sc) for v in buf))
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def _render_loop(self, eighth_s, lead_vol, lead_shape, bass_vol,
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offset_s=0.0, bars=None, melody_oct=4, with_bass=True):
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"""Schedule the MELODY (per-bar eighth attacks) plus a soft oom-pah
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bass. `offset_s` shifts the start (used for B sections / echoes);
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`bars` picks which MELODY bars to play in order."""
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bars = bars if bars is not None else list(range(4))
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tracks = []
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for idx, bi in enumerate(bars):
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bar_start = offset_s + idx * 8 * eighth_s
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if with_bass:
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root = self.BASS_ROOTS[bi % len(self.BASS_ROOTS)]
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fifth = "G" if root == "C" else "C"
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tracks.append((bar_start, root, 2, eighth_s * 4.2, bass_vol, "tri"))
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tracks.append((bar_start + eighth_s * 4, fifth, 2,
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eighth_s * 4.2, bass_vol, "tri"))
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slot = 0
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for (nm, nslots, oc) in self.MELODY[bi % len(self.MELODY)]:
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t = bar_start + slot * eighth_s
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tracks.append((t + eighth_s * 0.08, nm, oc + melody_oct - 4,
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eighth_s * nslots * 0.9, lead_vol, lead_shape))
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slot += nslots
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return tracks
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def _build_music(self):
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"""A real tune: public-domain "Twinkle Twinkle Little Star" arranged
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in C - soft sine lullaby on the title, bouncy triangle version during
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play. Gentle oom-pah bass, nothing harsh, no percussion."""
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# ---- menu: slow lullaby ----------------------------------------------
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e = 0.30 # one bar = 8 * 0.30 = 2.4 s
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tracks = self._render_loop(e, 0.085, "sine", 0.055)
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menu_total = 4 * 8 * e + 2.6 # 4 bars + tail
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self._menu_music = self._music_buffer(tracks, menu_total)
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# ---- play: bouncy version, with a brighter octave-up repeat ----------
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e2 = 0.225 # ~130 bpm eighth feel
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tracks = self._render_loop(e2, 0.115, "tri", 0.07)
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# B section: same tune one octave up, lighter, then the loop restarts
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tracks += self._render_loop(e2, 0.045, "sine", 0.0,
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offset_s=4 * 8 * e2, bars=[0, 1, 2, 3],
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melody_oct=5, with_bass=False)
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play_total = 2 * 4 * 8 * e2 + 1.6 # two passes, ~16 s of music
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self._play_music = self._music_buffer(tracks, play_total)
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self._menu = pygame.mixer.Sound(buffer=self._menu_music.tobytes())
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self._play = pygame.mixer.Sound(buffer=self._play_music.tobytes())
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self._menu.set_volume(0.42)
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self._play.set_volume(0.34)
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# ---- playback --------------------------------------------------------
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def play(self, name, vol=1.0, pitch_var=0):
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if not self.ok:
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return
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key = name
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if pitch_var:
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key = "%s%d" % (name, pitch_var)
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s = self.sounds.get(key)
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if s is None:
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s = self.sounds.get(name)
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if s is None:
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return
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ch = self.sfx_channels[self._ch_i]
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self._ch_i = (self._ch_i + 1) % len(self.sfx_channels)
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ch.set_volume(min(1.0, vol))
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ch.play(s)
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def start_menu_music(self):
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if not self.ok:
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return
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self.music_channel.set_volume(0.8)
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self.music_channel.play(self._menu, loops=-1)
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def start_play_music(self):
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if not self.ok:
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return
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self.music_channel.set_volume(0.8)
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self.music_channel.play(self._play, loops=-1)
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def stop_music(self):
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if self.ok:
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self.music_channel.stop()
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def set_muted(self, m):
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self.muted = m
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if self.ok:
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self.music_channel.set_volume(0.0 if m else 0.8)
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def set_sfx_muted(self, m):
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self.sfx_muted = m
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if self.ok:
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for ch in self.sfx_channels:
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ch.set_volume(0.0 if m else 1.0)
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