TVolumeControl Class

type TVolumeControl = class(TPersistent);

Name	Type	Description
ChannelCount	integer	Return channel count for the currently selected device.
ChannelLevel	single	Set or et the volume level for individual channels in the range from 0.0 to 1.0.
ChannelLevelDB	single	Set or et the volume level for individual channels in the range from mininimum dB to max.
HardwareSupport	boolean	Returns true, if Volume is controled in the hardware.
MasterLevel	single	Set or et the volume level for all channels in the range from 0.0 to 1.0.
MasterLeveldB	single	Set or et the volume level for call channels in the range from mininimum dB to max.
Mute	boolean	Set to True to mute and to False to unmute the currently selected device.
VolumeStep	integer	Returns the current volume Step Index in the range from 0 to VolumeStepCount-1.
VolumeStepCount	integer	Returns the number of Steps of the Volume control.

Name	Description
GetVolumeRange	The GetVolumeRange method gets the volume range, in decibels, of the audio stream that enters or leaves the audio endpoint device.
StepDown	The StepDown method by one step decrements, the volume level of the audio stream that enters or leaves the audio endpoint device.
StepUp	The StepUp method by one step increments, the volume level of the audio stream that enters or leaves the audio endpoint device.