DMUS_NOTE_PMSG

The DMUS_NOTE_PMSG structure contains data for a music-note event.

typedef struct DMUS_NOTE_PMSG {
    DMUS_PMSG_PART
    MUSIC_TIME mtDuration;
    WORD       wMusicValue;
    WORD       wMeasure;
    short      nOffset;
    BYTE       bBeat;
    BYTE       bGrid;
    BYTE       bVelocity;
    BYTE       bFlags;
    BYTE       bTimeRange;
    BYTE       bDurRange;
    BYTE       bVelRange;
    BYTE       bPlayModeFlags;
    BYTE       bSubChordLevel;
    BYTE       bMidiValue;
} DMUS_NOTE_PMSG;

DMUS_PMSG_PART

Macro for common message members. See DMUS_PMSG.

mtDuration

Duration of the note.

wMusicValue

Description of the note. In most play modes, this is a packed array of 4-bit values, as follows:

Octave

In the range from –2 through 14. The note is transposed up or down by the octave times 12.

Chord position

In the range from 0 through 15, although it should never be above 3. The first position in the chord is 0.

Scale position

In the range from 0 through 15. Typically it is only from 0 through 2, but it is possible to have a one-note chord and have everything above the chord be interpreted as a scale position.

Accidental

In the range from –8 through 7, but typically in the range from –2 through 2. This represents an offset that takes the note out of the scale.

In the fixed-play modes, the music value is a MIDI note value in the range from 0 through 127.

wMeasure

Measure in which this note occurs.

nOffset

Offset from the grid at which this note occurs, in music time.

bBeat

Beat (in measure) at which this note occurs.

bGrid

Grid offset from the beat at which this note occurs.

bVelocity

Note velocity.

bFlags

See DMUS_NOTEF_FLAGS.

bTimeRange

Range by which to randomize time.

bDurRange

Range by which to randomize duration.

bVelRange

Range by which to randomize velocity.

bPlayModeFlags

Play mode determining how the music value is related to the chord and subchord. For a list of values, see DMUS_PLAYMODE_FLAGS.

bSubChordLevel

Subchord level that the note uses. See DMUS_SUBCHORD.

bMidiValue

MIDI note value, converted from wMusicValue.

Remarks

When a note is to be played, the DMUS_NOTE_PMSG flows through the graph and any tools in the graph until it reaches the final MIDI output tool. When the tool recognizes that DMUS_NOTEF_NOTEON is set in the bFlags member, it sends a MIDI note-on message to the correct port (according to the dwPChannel member of the DMUS_PMSG part). It then clears the flag, adds mtDuration to the time stamp, and requeues the message so that the note is turned off at the appropriate time.

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dmusici.h.

See Also

IDirectMusicPerformance::SendPMsg, Music Values and MIDI Notes