- tools/musicator:\n - markov model generator and pattern generator operational\n- DDR sound generation in-progress

tools/musicator/midi_converter.py

@@ -0,0 +1,46 @@
+from mido import MidiFile
+
+MIDI_FILE = "/tmp/teletype_impostor_musicator/maestro-v3.0.0/2018/MIDI-Unprocessed_Schubert7-9_MID--AUDIO_16_R2_2018_wav.midi"
+
+# resolution: rows per beat (e.g. 4 = 16th notes)
+ROWS_PER_BEAT = 4
+
+names = ["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"]
+
+def note_name(n):
+    octave = n // 12 - 1
+    return f"{names[n % 12]}-{octave}"
+
+mid = MidiFile(MIDI_FILE)
+tpb = mid.ticks_per_beat
+
+row_ticks = tpb // ROWS_PER_BEAT
+
+time = 0
+rows = {}
+
+for msg in mid:
+    time += msg.time
+    if msg.type == "note_on" and msg.velocity > 0:
+        row = int(time // row_ticks)
+        rows.setdefault(row, []).append(msg.note)
+
+# build monophonic sequence (highest note wins)
+max_row = max(rows.keys())
+sequence = []
+
+for r in range(max_row + 1):
+    if r in rows:
+        n = max(rows[r])
+        sequence.append(note_name(n))
+    else:
+        sequence.append("...")
+
+# trim (optional)
+sequence = sequence[:512]
+
+# output as Lua
+print("sequence = {")
+for n in sequence:
+    print(f'  "{n}",')
+print("}")