
    -i <instrument>  Instrument name or number (default: piano)
    -b <beats>       Default beats per note (default: 1.0)

    Simple:     \"FACE\" or \"C D E F\"   (uses default beats)
    With beats: \"C:2 D:0.5 E:1.5 F:1\" (note:beats format)
    printf("Examples:
    CeBeans_MIDI FACE
    CeBeans_MIDI \"C D E F G A B C5\" -o song.mid
    CeBeans_MIDI \"C:2 E:1 G:1 C5:2\" -i violin -o chord.mid
    CeBeans_MIDI \"A:0.5 B:0.5 C:1 D:2\" -b 1.5 -o rhythm.mid

Notes:
    - Use letters A-G for note names
    - Add octave number (0-9), default is 4
    - Add \":beats\" after note for custom duration (e.g., C:2 = 2 beats)
    - Beats can be decimal (0.25, 0.5, 1.5, etc.)