Microsoft DirectX 9.0

DMUS_NOTE_PMSG

The DMUS_NOTE_PMSG structure contains message data for a MIDI note.

Syntax

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;
  char   cTranspose;
} DMUS_NOTE_PMSG;

Members

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.

Value	Description
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 the time at which the note plays.

bDurRange

Range by which to randomize the duration of the note.

bVelRange

Range by which to randomize the velocity of the note.

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.

cTranspose

Transposition to add to bMidiValue after conversion from wMusicValue.

Remarks

When the output tool receives a message with DMUS_NOTEF_NOTEON in bFlags, it sends a MIDI note-on message to the synthesizer. It then clears the DMUS_NOTEF_NOTEON flag, adds mtDuration to the time stamp, and requeues the message so that the note is turned off at the appropriate time.

The values in bTimeRange and bDurRange have a logarithmic relationship to actual time. A value of 255 specifies that the time can be randomized by up to 825 music time ticks in either direction.

Requirements

Header: Declared in dmusici.h.

See Also