| Microsoft DirectX 9.0 SDK Update (Summer 2004) |
DMUS_IO_SUBCHORD
The DMUS_IO_SUBCHORD structure contains information about a subchord. Used in the Chord Track List.
Syntax
typedef struct _DMUS_IO_SUBCHORD {
DWORD dwChordPattern;
DWORD dwScalePattern;
DWORD dwInversionPoints;
DWORD dwLevels;
BYTE bChordRoot;
BYTE bScaleRoot;
} DMUS_IO_SUBCHORD;
Members
dwChordPattern
Notes in the subchord. Each of the lower 24 bits represents a semitone, starting with the root at the least significant bit, and the bit is set if the note is in the chord.
dwScalePattern
Notes in the scale. Each of the lower 24 bits represents a semitone, starting with the root at the least significant bit, and the bit is set if the note is in the scale.
dwInversionPoints
Points in the scale at which inversions can occur. Bits that are off signify that the notes in the interval cannot be inverted. Thus, the pattern 100001111111 indicates that inversions are allowed anywhere except between the fifth and seventh degrees of a major scale.
dwLevels
Which levels are supported by this subchord. Certain instruments can be assigned different levels (such as to play only the lower subchords of a chord), and this value is a way of mapping subchords to those levels.
bChordRoot
Root of the subchord, where 0 is the lowest C in the range and 23 is the top B.
bScaleRoot
Root of the scale, where 0 is the lowest C in the range and 23 is the top B.
Requirements
Header: Declared in dmusicf.h.
See Also
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