Microsoft DirectX 8.0 (C++)

DMUS_LFOPARAMS

Defines the low-frequency oscillator for a DLS level 1 articulation chunk. It is used in the DMUS_ARTICPARAMS structure.

typedef struct {
    PCENT pcFrequency;
    TCENT tcDelay;
    GCENT gcVolumeScale;
    PCENT pcPitchScale;
    GCENT gcMWToVolume;
    PCENT pcMWToPitch;
} DMUS_LFOPARAMS;

Members

pcFrequency
Frequency, in pitch units. See Remarks.
tcDelay
Initial delay, in time cents. See Remarks.
gcVolumeScale
Scaling of output to control tremolo, in attenuation units. See Remarks.
pcPitchScale
Scaling of LFO output to control vibrato, in pitch units. See Remarks.
gcMWToVolume
Modulation wheel range to control tremolo, in attenuation units. See Remarks.
pcMWToPitch
Modulation wheel range to control tremolo, in attenuation units. See Remarks.

Remarks

The DLS Level 1 specification defines time cents, pitch cents, and attenuation as 32-bit logarithmic values. See the specification from the MIDI Manufacturers Association for details.

Requirements

  Header: Declared in dmdls.h.

See Also

DMUS_ARTICPARAMS