// dmusprop.h

typedef struct _SYNTHVOICEPRIORITY_INSTANCE {
  DWORD ChannelGroup;
  DWORD Channel;
} SYNTHVOICEPRIORITY_INSTANCE, *PSYNTHVOICEPRIORITY_INSTANCE;
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Windows Driver Kit DDI reference (ns-dmusprop-_synthvoicepriority_instance)

_SYNTHVOICEPRIORITY_INSTANCE structure

Description

The SYNTHVOICEPRIORITY_INSTANCE structure identifies a voice in a MIDI synthesizer by specifying the voice's channel group (set of 16 MIDI channels) and its channel number within that group.

Members

`ChannelGroup`

Specifies the channel group that the voice belongs to. Channel groups are numbered beginning at zero. Each channel group contains 16 channels.

`Channel`

Specifies the channel that the voice is on. This member contains a channel number in the range 0 through 15. It identifies a channel in the channel group.

Remarks

The KSPROPERTY_SYNTH_VOICEPRIORITY property request uses the SYNTHVOICEPRIORITY_INSTANCE structure for its property descriptor. The structure specifies which voice gets priority when the miniport driver needs to bump voices from the cache.

SYNTHVOICEPRIORITY_INSTANCE - NtDoc