#!/usr/bin/env python3
"""
04-single-note.py - Single note example (from MIDIUtil docs, adapted)
Creates a minimal single-track MIDI file with one note.
Reference: examples/single-note-example.py from MIDIUtil repo
"""
from midiutil import MIDIFile

# Create the MIDIFile Object
my_midi = MIDIFile(1)

# Add track name and tempo
track = 0
time = 0
my_midi.addTrackName(track, time, "Sample Track")
my_midi.addTempo(track, time, 120)

# Add a single note
channel = 0       # MIDI channel 1
pitch = 60        # MIDI note number (60 = middle C / C4)
duration = 1      # Duration in beats (1 = quarter note)
volume = 100      # MIDI velocity 0-127

my_midi.addNote(track, channel, pitch, time, duration, volume)

# Write to disk
with open("single-note.mid", 'wb') as binfile:
    my_midi.writeFile(binfile)

print("Written: single-note.mid")
print(f"  Note: C4(60) on channel {channel}, {duration} beat(s) at 120 BPM")