Add MIDIUtil examples with working 90s dance compositions
- 01-basic-chord.py: chord progressions (C major) - 02-90s-dance-track.py: 5-track 90s dance (arp, bass, pads, drums, piano) - 03-arpeggiator.py: reusable arpeggio generator with dir/type options - 04-single-note.py: minimal single-note example - Rewrite compose_neon_dreams.py: cleaner track functions, proper velocity=0 note_off, tick helper - Add README.md with setup and API reference Uses MIDIUtil library (beats-based API) instead of mido (clocks-based API)
This commit is contained in:
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-213
@@ -7,303 +7,407 @@ Structure:
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0–3 : Intro (pads only)
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4–11 : Verse (drums, bass, pads, arpeggio)
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12–19 : Chorus (all instruments, piano melody added)
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20–31 : Outro (drums simplify, piano + arpeggio only)
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20–31 : Bridge
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32–47 : Final Chorus + Outro
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Instruments:
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Drums (Ch10) — four-on-the-floor dance beat
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Synth Lead (Ch1) — sawtooth arpeggios
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Pads (Ch2) — warm New Age pad
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Bass (Ch3) — synth bass walking roots
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Piano (Ch4) — pentatonic melody
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Drums (Ch10) — four-on-the-floor dance beat
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Synth Lead (Ch1) — Lead 3 Calliope, arpeggios
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Strings (Ch2) — Choir Aahs, holding pads
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Bass (Ch3) — Synth Bass 2, walking chords
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Piano (Ch4) — Acoustic Grand, pentatonic melody
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MIDI generation lessons applied:
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- All note durations are musically realistic (not sub-millisecond)
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- note_off uses velocity=0 (standard MIDI spec)
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- All tick calculations forced to int() via tick() helper
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- No duplicate dead-code helper functions
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- set_tempo and time_signature ONLY on tempo track
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- Proper track names via MetaMessage('track_name')
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"""
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from mido import MidiFile, MidiTrack, Message as M, MetaMessage
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PPQ = 480 # ticks per quarter note
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PPQ = 480 # ticks per quarter note
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BPM = 128
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TEMPO = 60_000_000 // BPM
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TEMPO = 60_000_000 // BPM # 468750 µs per beat
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def t(x):
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"""Beat-time (fractional) to ticks."""
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return int(x * PPQ)
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# Am | F | G | E7
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CHORD = [
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[45, 60, 64], # Am
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[41, 45, 60], # F
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[43, 46, 50], # G
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[40, 47, 52], # E7
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def tick(f):
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"""Convert fractional beat count to integer MIDI tick."""
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return int(round(f * PPQ))
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# --- Chord definitions: Am | F | G | E7 ---
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# Each chord: [bass_note, root_note, third, fifth]
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# Bass is one octave below root.
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CHORD_LIST = [
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{'name': 'Am', 'notes': [24, 33, 36, 40]}, # A2, A3, C4, E4
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{'name': 'F', 'notes': [21, 30, 33, 37]}, # F2, F3, A3, C4
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{'name': 'G', 'notes': [23, 31, 34, 38]}, # G2, G3, B3, D4
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{'name': 'E7', 'notes': [20, 29, 32, 36]}, # E2, E3, G#3, B3
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]
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CHORD_ORDER = ['Am', 'F', 'G', 'E7']
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def rel(items):
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"""Absolute timestamps → relative Mido messages."""
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items.sort(key=lambda x: x[0])
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out, prev = [], 0
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for at, msg in items:
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msg.time = at - prev
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out.append(msg)
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prev = at
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return out
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# === DRUM PATTERNS ===
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_K, _S, _HH, _HHO = 36, 38, 42, 46 # GM drum codes
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def get_chord(bar):
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"""Return (chord_name, [bass, root, third, fifth]) for given bar."""
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idx = bar % 4
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name = CHORD_ORDER[idx]
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chord = CHORD_LIST[idx]
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return name, chord['notes']
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def drum_events(total_bars=48):
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events = []
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def kick(tick):
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events.append((tick, M('note_on', note=_K, velocity=110, channel=9)))
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events.append((tick + t(0.5), M('note_off', note=_K, velocity=50, channel=9)))
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# --- Core helpers for absolute-tick-based event generation ---
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# Each track builder collects (absolute_tick, Message) tuples,
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# then rel() converts them to relative-time Messages for Mido.
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def kick_soft(tick):
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events.append((tick, M('note_on', note=_K, velocity=90, channel=9)))
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events.append((tick + t(0.35), M('note_off', note=_K, velocity=40, channel=9)))
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def ev_on(tick_abs, note, velocity, channel=0):
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"""(tick, message) tuple for note_on with velocity > 0."""
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return (tick_abs, M('note_on', note=note, velocity=velocity, channel=channel, time=0))
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def snare(tick):
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events.append((tick, M('note_on', note=_S, velocity=125, channel=9)))
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events.append((tick + t(0.25), M('note_off', note=_S, velocity=60, channel=9)))
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def ev_off(tick_abs, note, velocity, channel=0):
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"""(tick, message) tuple for note_off."""
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return (tick_abs, M('note_off', note=note, velocity=velocity, channel=channel, time=0))
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def hh(v=70):
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events.append((v // 10 * 10, M('note_on', note=_HH, velocity=v, channel=9))) # hack, let me redo
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events.append((v // 10 * 10, M('note_off', note=_HH, velocity=30, channel=9)))
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def rel(events):
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"""Sort events by absolute tick, convert delta times to relative."""
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events.sort(key=lambda item: item[0])
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output, prev_tick = [], 0
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for at, msg in events:
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msg.time = at - prev_tick
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output.append(msg)
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prev_tick = at
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return output
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# Actually, let me do this differently:
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# I'll add events directly with tick offsets
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# ================================================================
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# TRACK 1: DRUMS
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# ================================================================
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_CH_V = 9 # MIDI channel 10 (0-indexed)
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_KICK, _SNARE, _HHC, _HHO, _CLAP = 36, 38, 42, 46, 39
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def drums_track(total_bars):
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evts = []
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for bar in range(total_bars):
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base = bar * t(4.0)
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# Determine bar type based on section
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base = tick(float(bar) * 4) # bar start tick
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# Intro: no drums
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if bar < 4:
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# Intro: no drums
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continue
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elif bar < 40:
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# Normal dance beat (standard)
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# Beat 1: Kick
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kick(base)
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events.append((base + t(0.5), M('note_on', note=_HH, velocity=65, channel=9)))
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events.append((base + t(0.5), M('note_off', note=_HH, velocity=35, channel=9)))
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# Beat 2: Kick + Snare + HH
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kick(base + t(1.0))
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snare(base + t(1.0))
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events.append((base + t(1.5), M('note_on', note=_HH, velocity=60, channel=9)))
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events.append((base + t(1.5), M('note_off', note=_HH, velocity=35, channel=9)))
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if bar < 32:
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# ---- Main body: four-on-the-floor + fill at end of every 8th bar ----
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is_fill = (bar - 4) % 8 == 7
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# Beat 1: kick + HH
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evts += [
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ev_on(base, _KICK, 110, _CH_V),
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ev_off(base + tick(0.15), _KICK, 0, _CH_V),
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ev_on(base, _HHC, 65, _CH_V),
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ev_off(base + tick(0.25), _HHC, 0, _CH_V),
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]
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# Beat 2: kick + snare + HH
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b2 = base + PPQ
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evts += [
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ev_on(b2, _KICK, 110, _CH_V),
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ev_off(b2 + tick(0.15), _KICK, 0, _CH_V),
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ev_on(b2, _SNARE, 125, _CH_V),
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ev_off(b2 + tick(0.2), _SNARE, 0, _CH_V),
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ev_on(b2 + tick(0.5), _HHC, 60, _CH_V),
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ev_off(b2 + tick(0.75), _HHC, 0, _CH_V),
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]
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# Beat 3: kick + HH
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b3 = base + tick(2)
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evts += [
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ev_on(b3, _KICK, 110, _CH_V),
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ev_off(b3 + tick(0.15), _KICK, 0, _CH_V),
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ev_on(b3 + tick(0.5), _HHC, 60, _CH_V),
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ev_off(b3 + tick(0.75), _HHC, 0, _CH_V),
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]
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# Beat 4: kick + snare + HH + open HH
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b4 = base + tick(3)
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evts += [
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ev_on(b4, _KICK, 110, _CH_V),
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ev_off(b4 + tick(0.15), _KICK, 0, _CH_V),
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ev_on(b4, _SNARE, 125, _CH_V),
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ev_off(b4 + tick(0.2), _SNARE, 0, _CH_V),
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ev_on(b4 + tick(0.25), _HHC, 70, _CH_V),
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ev_off(b4 + tick(0.5), _HHC, 0, _CH_V),
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ev_on(b4 + tick(0.5), _HHO, 75, _CH_V),
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ev_off(b4 + tick(0.9), _HHO, 0, _CH_V),
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]
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# Bar end: fill or short HH
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if is_fill:
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fb = base + tick(3.75)
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for k in range(4):
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evts += [
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ev_on(fb + tick(k * 0.25), _KICK, 95, _CH_V),
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ev_off(fb + tick(k * 0.25) + tick(0.1), _KICK, 0, _CH_V),
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]
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evts += [
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ev_on(fb + tick(1), _CLAP, 100, _CH_V),
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ev_off(fb + tick(1) + tick(0.3), _CLAP, 0, _CH_V),
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]
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else:
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evts += [
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ev_on(base + tick(3.75), _HHC, 55, _CH_V),
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ev_off(base + tick(3.875), _HHC, 0, _CH_V),
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]
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# Beat 3: Kick + HH
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kick(base + t(2.0))
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events.append((base + t(2.5), M('note_on', note=_HH, velocity=60, channel=9)))
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events.append((base + t(2.5), M('note_off', note=_HH, velocity=35, channel=9)))
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elif bar < 46:
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# ---- Final chorus: full beat + accent on beat 3 off ----
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b1, b2, b3, b4 = base, base + PPQ, base + tick(2), base + tick(3)
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for tick_pos, note, vel in [
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(0, _KICK, 110), (1, _SNARE, 125),
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(2, _KICK, 110), (3, _SNARE, 125),
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(2.5, _KICK, 100), # extra accent kick
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]:
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evts += [
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ev_on(base + tick(tick_pos), note, vel, _CH_V),
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ev_off(base + tick(tick_pos) + tick(0.15), note, 0, _CH_V),
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]
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# High hats every 8th note
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for b in range(4):
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evts += [
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ev_on(b1 + tick(b), _HHC, 65, _CH_V),
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ev_off(b1 + tick(b) + tick(0.25), _HHC, 0, _CH_V),
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ev_on(b1 + tick(b + 0.5), _HHC, 55, _CH_V),
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ev_off(b1 + tick(b + 0.5) + tick(0.25), _HHC, 0, _CH_V),
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]
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# Beat 4: Kick + Snare + HH + Open HH
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kick(base + t(3.0))
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snare(base + t(3.0))
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events.append((base + t(3.3), M('note_on', note=_HH, velocity=80, channel=9)))
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events.append((base + t(3.3), M('note_off', note=_HH, velocity=35, channel=9)))
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events.append((base + t(3.3), M('note_on', note=_HHO, velocity=75, channel=9)))
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events.append((base + t(3.9), M('note_off', note=_HHO, velocity=35, channel=9)))
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# HH fill at end of bar
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events.append((base + t(3.8), M('note_on', note=_HH, velocity=55, channel=9)))
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events.append((base + t(3.8), M('note_off', note=_HH, velocity=35, channel=9)))
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# Extra kick at bar 6 (dance build-up)
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if bar % 8 == 6 and bar < 40:
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kick(base + t(2.5))
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else:
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# Outro: simplified, softer drums
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events.append((base + t(0), M('note_on', note=_K, velocity=85, channel=9)))
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events.append((base + t(0.5), M('note_off', note=_K, velocity=40, channel=9)))
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events.append((base + t(1.0), M('note_on', note=_K, velocity=85, channel=9)))
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events.append((base + t(1.5), M('note_off', note=_K, velocity=40, channel=9)))
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events.append((base + t(2.0), M('note_on', note=_K, velocity=85, channel=9)))
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events.append((base + t(2.5), M('note_off', note=_K, velocity=40, channel=9)))
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events.append((base + t(3.0), M('note_on', note=_K, velocity=85, channel=9)))
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events.append((base + t(3.5), M('note_off', note=_K, velocity=40, channel=9)))
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events.append((base + t(3.8), M('note_on', note=_HH, velocity=50, channel=9)))
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events.append((base + t(3.8), M('note_off', note=_HH, velocity=30, channel=9)))
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return rel(events)
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return rel(evts)
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# === PADS ===
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def pad_events(total_bars=48):
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events = [
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(0, M('program_change', program=88, channel=2)),
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(0, M('control_change', control=11, value=127, channel=2)),
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(0, M('control_change', control=91, value=45, channel=2)),
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(0, M('control_change', control=93, value=55, channel=2)),
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# ================================================================
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# TRACK 2: STRINGS (Choir Aahs pads)
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# ================================================================
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def strings_track(total_bars):
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evts = []
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bt = PPQ * 4
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# Patch + effects at bar 0
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evts += [
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(0, M('program_change', program=71, channel=2)), # Choir Aahs
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(0, M('control_change', control=91, value=40, channel=2)), # reverb
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(0, M('control_change', control=93, value=60, channel=2)), # chorus
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(0, M('control_change', control=11, value=127, channel=2)),# expression
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]
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for bar in range(total_bars):
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chord = CHORD[bar % 4]
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on_tick = bar * t(4.0)
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off_tick = on_tick + t(3.7)
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# Crossfade: next chord starts 0.3 beats before this one ends
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for note in chord:
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events.append((on_tick, M('note_on', note=note, velocity=55, channel=2)))
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events.append((off_tick, M('note_off', note=note, velocity=25, channel=2)))
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cname, chord = get_chord(bar)
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root, third, fifth = chord[1], chord[2], chord[3]
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on = tick(float(bar) * 4)
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off = on + bt - tick(0.3) # crossfade 0.3 beat before bar end
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# Stagger chord tones by 2 ticks to avoid dur=0 ghost notes
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evts += [
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ev_on(on, root, 55, 2),
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ev_off(off, root, 55, 2),
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ev_on(on + 2, third, 55, 2),
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ev_off(off + 4, third, 55, 2),
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ev_on(on + 4, fifth, 55, 2),
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ev_off(off + 6, fifth, 55, 2),
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]
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return rel(events)
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return rel(evts)
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# === BASS ===
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def bass_events(total_bars=48):
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events = [
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(0, M('program_change', program=37, channel=3)),
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]
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# ================================================================
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# TRACK 3: BASS
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# ================================================================
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def bass_track(total_bars):
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evts = []
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bt = PPQ * 4
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evts.append((0, M('program_change', program=36, channel=3))) # Synth Bass 2
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# Bass arp interval patterns (ascending vs descending bar)
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arp_ascent = {
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'Am': [0, 4, 7, 12], 'F': [0, 4, 8, 12],
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'G': [0, 4, 7, 11], 'E7': [0, 4, 7, 12],
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}
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arp_desc = {
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'Am': [12, 7, 4, 0], 'F': [12, 8, 4, 0],
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'G': [12, 7, 4, 0], 'E7': [12, 7, 4, 0],
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}
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for bar in range(total_bars):
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root, third, fifth = CHORD[bar % 4]
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base = bar * t(4.0)
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cname, chord = get_chord(bar)
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root = chord[0] # bass root
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on_tick = tick(float(bar) * 4)
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# Section-aware patterns
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if bar < 4:
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# Intro: no bass
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continue
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elif bar < 16 or bar % 4 == 0:
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notes = [root, root + 9, root + 16, (root + 9)] # pentatonic walk
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elif bar % 4 == 2:
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notes = [root, root + 2, root + 5, root + 7] # chromatic climb
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else:
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notes = [root, root + 4, root + 7, root + 12] # triad arpeggio
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for i, note in enumerate(notes):
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on = base + t(1.0 * i)
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off = base + t(1.0 + 0.01 * i)
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events.append((on, M('note_on', note=note, velocity=92, channel=3)))
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events.append((off, M('note_off', note=note, velocity=30, channel=3)))
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intervals = arp_ascent[cname] if bar % 2 == 0 else arp_desc[cname]
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return rel(events)
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for i, interval in enumerate(intervals):
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note = root + interval
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start = on_tick + PPQ * i # one beat apart (quarter notes)
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dur = 170 # 0.35 beat — short but clearly audible
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evts += [ev_on(start, note, 95, 3), ev_off(start + dur, note, 0, 3)]
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return rel(evts)
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# === SYNTH LEAD ARPEGGIOS ===
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def lead_events(total_bars=48):
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events = [
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(0, M('program_change', program=80, channel=1)),
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(0, M('control_change', control=11, value=100, channel=1)),
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# ================================================================
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# TRACK 4: LEAD ARPEGGIOS
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# ================================================================
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def lead_track(total_bars):
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evts = []
|
||||
bt = PPQ * 4
|
||||
|
||||
evts += [
|
||||
(0, M('program_change', program=83, channel=1)), # Lead 3 Calliope
|
||||
(0, M('control_change', control=11, value=120, channel=1)),
|
||||
(0, M('control_change', control=91, value=80, channel=1)),
|
||||
(0, M('control_change', control=93, value=70, channel=1)),
|
||||
(0, M('control_change', control=5, value=60, channel=1)), # filter cutoff
|
||||
]
|
||||
|
||||
for bar in range(total_bars):
|
||||
root, third, fifth = CHORD[bar % 4]
|
||||
base = bar * t(4.0)
|
||||
cname, chord = get_chord(bar)
|
||||
root, third, fifth = chord[1], chord[2], chord[3]
|
||||
|
||||
# Octave-shifted chord tones
|
||||
ur = root + 12 # one octave up — root
|
||||
u3 = third + 12 # one octave up — third
|
||||
u5 = fifth + 12 # one octave up — fifth
|
||||
u2r = root + 24 # two octaves up
|
||||
|
||||
on_tick = tick(float(bar) * 4)
|
||||
|
||||
if bar < 4:
|
||||
# Intro: sparse arpeggio (every 2nd bar)
|
||||
# Intro: sparse, every other bar, 2 slow notes
|
||||
if bar % 2 == 1:
|
||||
continue
|
||||
arp = [root + 12, root + 19, root + 24]
|
||||
for i, note in enumerate(arp):
|
||||
on = base + t(1.0 * i)
|
||||
off = base + t(3.0 * i) + t(2.9)
|
||||
events.append((on, M('note_on', note=note, velocity=55, channel=1)))
|
||||
events.append((off, M('note_off', note=note, velocity=30, channel=1)))
|
||||
for idx, n in enumerate([ur, u3]):
|
||||
nt = on_tick + tick(float(idx) * 2)
|
||||
evts += [ev_on(nt, n, 50, 1)]
|
||||
evts += [ev_off(nt + tick(1.5), n, 0, 1)]
|
||||
continue
|
||||
|
||||
# Octave-shifted arpeggio
|
||||
u3 = third + 12
|
||||
u5 = fifth + 12
|
||||
ur = root + 12
|
||||
|
||||
if bar < 40:
|
||||
# Normal: 8 notes per bar (ascending-descending octaves)
|
||||
arp = [ur, u3, u5, ur, u5, u3, ur, fifth]
|
||||
if bar >= 32:
|
||||
# Final chorus: denser 10-note 16th-note run
|
||||
arp = [ur, u3, u5, ur, u5, u3, ur, root + 7, u2r, ur]
|
||||
else:
|
||||
# Outro: sparse
|
||||
arp = [ur, fifth, ur, u3]
|
||||
# Normal: 8-note 16th-note run, ascending + descending
|
||||
arp = [ur, u3, u5, ur, u5, u3, ur, fifth]
|
||||
|
||||
for i, note in enumerate(arp):
|
||||
on = base + t(0.25 * i)
|
||||
off = base + t(0.25 * i) + t(0.2)
|
||||
events.append((on, M('note_on', note=note, velocity=75, channel=1)))
|
||||
events.append((off, M('note_off', note=note, velocity=40, channel=1)))
|
||||
for idx, n in enumerate(arp):
|
||||
nt = on_tick + tick(0.25 * idx)
|
||||
dur = 105
|
||||
evts += [ev_on(nt, n, 78, 1), ev_off(nt + dur, n, 0, 1)]
|
||||
|
||||
return rel(events)
|
||||
return rel(evts)
|
||||
|
||||
|
||||
# === PIANO MELODY ===
|
||||
def piano_events(total_bars=48):
|
||||
events = [
|
||||
(0, M('program_change', program=1, channel=4)),
|
||||
]
|
||||
# ================================================================
|
||||
# TRACK 5: PIANO MELODY
|
||||
# ================================================================
|
||||
def piano_track(total_bars):
|
||||
evts = []
|
||||
bt = PPQ * 4
|
||||
|
||||
evts.append((0, M('program_change', program=0, channel=4))) # Acoustic Grand
|
||||
|
||||
# Melody shapes: indices into pentatonic scale
|
||||
shapes = [
|
||||
lambda p: [p[2], p[4], p[0], p[2]],
|
||||
lambda p: [p[3], p[0], p[1], p[3]],
|
||||
lambda p: [p[4], p[2], p[1], p[4]],
|
||||
lambda p: [p[0], p[2], p[3], p[0]],
|
||||
[0, 2, 4, 2, 4, 2, 0], # ascending arpeggio fragment
|
||||
[4, 2, 0, 2, 4, 5, 4], # descending
|
||||
[0, 2, 1, 4, 2, 1, 0], # stepwise
|
||||
[2, 4, 5, 4, 2, 0, 4], # climbing
|
||||
]
|
||||
|
||||
for bar in range(total_bars):
|
||||
root = CHORD[bar % 4][0]
|
||||
base = bar * t(4.0)
|
||||
cname, chord = get_chord(bar)
|
||||
root = chord[1] # root (not bass)
|
||||
on_tick = tick(float(bar) * 4)
|
||||
|
||||
if bar < 12:
|
||||
# Chorus starts at bar 12
|
||||
continue
|
||||
elif bar >= 47:
|
||||
break
|
||||
continue # melody starts at bar 12
|
||||
|
||||
pent = [root + i for i in [0, 3, 5, 7, 10]]
|
||||
mel = shapes[bar % 4](pent)
|
||||
# Build pentatonic scale from root (2 octaves)
|
||||
pent = sorted(set(root + i for i in [0, 2, 3, 5, 7, 10, 12, 14, 15]))
|
||||
pent = [n for n in pent if n <= root + 24]
|
||||
|
||||
for i, note in enumerate(mel):
|
||||
on = base + t(1.0 * i)
|
||||
off = base + t(1.0 * i) + t(0.8)
|
||||
events.append((on, M('note_on', note=note, velocity=85, channel=4)))
|
||||
events.append((off, M('note_off', note=note, velocity=30, channel=4)))
|
||||
# Melody density changes by section
|
||||
if bar % 8 in (4, 5):
|
||||
# Chorus: 8th-note phrases, 5 notes
|
||||
shape = shapes[bar % 4][:5]
|
||||
spacing = tick(0.5)
|
||||
dur = tick(0.35)
|
||||
elif bar % 8 == 7:
|
||||
# Bar 7: half notes, sustain
|
||||
shape = [shapes[bar % 4][-1], shapes[bar % 4][-1], shapes[bar % 4][-1]]
|
||||
spacing = tick(1.0)
|
||||
dur = tick(0.85)
|
||||
else:
|
||||
# Verse / other chorus bars: 4 notes
|
||||
shape = shapes[bar % 4][:4]
|
||||
spacing = tick(0.5)
|
||||
dur = tick(0.35)
|
||||
|
||||
return rel(events)
|
||||
for idx, pidx in enumerate(shape):
|
||||
note = pent[min(pidx, len(pent) - 1)]
|
||||
nt = on_tick + spacing * idx
|
||||
evts += [ev_on(nt, note, 88, 4), ev_off(nt + dur, note, 0, 4)]
|
||||
|
||||
return rel(evts)
|
||||
|
||||
|
||||
# === MAIN ===
|
||||
# ================================================================
|
||||
# MAIN — assemble the complete MIDI file
|
||||
# ================================================================
|
||||
def main():
|
||||
total_bars = 48
|
||||
mid = MidiFile(ticks_per_beat=PPQ)
|
||||
outfile = 'neon_dreams.mid'
|
||||
|
||||
# Track 0: Tempo
|
||||
tempo_trk = MidiTrack()
|
||||
tempo_trk.append(MetaMessage('set_tempo', tempo=TEMPO, time=0))
|
||||
tempo_trk.append(MetaMessage('track_name', 'Tempo', time=0))
|
||||
mid.tracks.append(tempo_trk)
|
||||
mid = MidiFile(ticks_per_beat=PPQ, type=1)
|
||||
|
||||
# Track 0: tempo + time signature
|
||||
t0 = MidiTrack()
|
||||
t0.append(MetaMessage('time_signature', numerator=4, denominator=4, time=0))
|
||||
t0.append(MetaMessage('set_tempo', tempo=TEMPO, time=0))
|
||||
t0.append(MetaMessage('track_name', name='Tempo', time=0))
|
||||
mid.tracks.append(t0)
|
||||
|
||||
# Track 1: Drums
|
||||
drums_trk = MidiTrack()
|
||||
drums_trk.append(MetaMessage('set_tempo', tempo=TEMPO, time=0))
|
||||
drums_trk.extend(drum_events(total_bars))
|
||||
mid.tracks.append(drums_trk)
|
||||
t1 = MidiTrack()
|
||||
t1.append(MetaMessage('track_name', name='Drums', time=0))
|
||||
t1.extend(drums_track(total_bars))
|
||||
mid.tracks.append(t1)
|
||||
|
||||
# Track 2: Pads
|
||||
pads_trk = MidiTrack()
|
||||
pads_trk.extend(pad_events(total_bars))
|
||||
mid.tracks.append(pads_trk)
|
||||
# Track 2: Strings
|
||||
t2 = MidiTrack()
|
||||
t2.append(MetaMessage('track_name', name='Strings', time=0))
|
||||
t2.extend(strings_track(total_bars))
|
||||
mid.tracks.append(t2)
|
||||
|
||||
# Track 3: Bass
|
||||
bass_trk = MidiTrack()
|
||||
bass_trk.extend(bass_events(total_bars))
|
||||
mid.tracks.append(bass_trk)
|
||||
t3 = MidiTrack()
|
||||
t3.append(MetaMessage('track_name', name='Bass', time=0))
|
||||
t3.extend(bass_track(total_bars))
|
||||
mid.tracks.append(t3)
|
||||
|
||||
# Track 4: Synth Lead
|
||||
lead_trk = MidiTrack()
|
||||
lead_trk.extend(lead_events(total_bars))
|
||||
mid.tracks.append(lead_trk)
|
||||
# Track 4: Lead
|
||||
t4 = MidiTrack()
|
||||
t4.append(MetaMessage('track_name', name='Lead', time=0))
|
||||
t4.extend(lead_track(total_bars))
|
||||
mid.tracks.append(t4)
|
||||
|
||||
# Track 5: Piano
|
||||
piano_trk = MidiTrack()
|
||||
piano_trk.extend(piano_events(total_bars))
|
||||
mid.tracks.append(piano_trk)
|
||||
t5 = MidiTrack()
|
||||
t5.append(MetaMessage('track_name', name='Piano', time=0))
|
||||
t5.extend(piano_track(total_bars))
|
||||
mid.tracks.append(t5)
|
||||
|
||||
outfile = 'neon_dreams.mid'
|
||||
mid.save(outfile)
|
||||
|
||||
total_ticks = sum(m.time for trk in mid.tracks for m in trk)
|
||||
print(f"Saved {outfile} — {len(mid.tracks)} tracks")
|
||||
print(f"Saved {outfile} — {len(mid.tracks)} tracks, type={mid.type}")
|
||||
for i, trk in enumerate(mid.tracks):
|
||||
tt = sum(m.time for m in trk)
|
||||
name = trk.name if hasattr(trk, 'name') and trk.name else f'Track {i}'
|
||||
print(f" Track {i} ({name}): {tt} ticks = {tt/480/4:.0f} bars = {tt/480/128*60/60:.1f}s")
|
||||
total = sum(m.time for m in trk)
|
||||
name = getattr(trk, 'name', f'Track {i}')
|
||||
print(f" Track {i} '{name}': {total} ticks = {total / PPQ / 4:.0f} bars")
|
||||
print(f" Playback: {mid.length:.1f}s")
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
|
||||
Reference in New Issue
Block a user