// ksmedia.h

typedef struct {
  ULONG QuietCompression;
  ULONG LoudCompression;
} KSAUDIO_DYNAMIC_RANGE, *PKSAUDIO_DYNAMIC_RANGE;
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Windows Driver Kit DDI reference (ns-ksmedia-ksaudio_dynamic_range)

KSAUDIO_DYNAMIC_RANGE structure

Description

The KSAUDIO_DYNAMIC_RANGE structure specifies the dynamic range of an audio stream. This structure is used to get or set the data value for the KSPROPERTY_AUDIO_DYNAMIC_RANGE property.

Members

`QuietCompression`

Specifies the compression level for soft sounds. This value ranges from 0 to 100 percent (represented as 0xFFFFFFFF) of the linear range compression for soft sounds. The higher this value, the higher the volume of soft sounds.

`LoudCompression`

Specifies the compression level for loud sounds. This value ranges from 0 to 100 percent (represented as 0xFFFFFFFF) of the linear range compression for loud sounds. The higher this value, the lower the volume of loud sounds.

Remarks

By default, both structure members are set to zero percent, which reproduces the full dynamic range of the audio stream.

KSAUDIO_DYNAMIC_RANGE - NtDoc