Gives the range of values for speakerphone volume and gain.
An example SpeakerPhoneSpecs entry is shown below. Entries always occupy four DWORDs.
HKR,, SpeakerPhoneSpecs,1, 00,00,00,00, 0f,00,00,00, 03,00,00,00, 00,00,00,00
The value of the entry corresponds to the C structure below:
typedef struct SPEAKERPHONE_SPEC {
DWORD SpeakerPhoneVolMax;
DWORD SpeakerPhoneVolMin;
DWORD SpeakerPhoneGainMax;
DWORD SpeakerPhoneGainMin;
} SPEAKERPHONE_SPEC;
Note that the maximum can be greater or less than the minimum. For example, a microphone's attenuation setting would have a maximum value that is numerically less that the minimum.
The speakerphone volume and gain are set through the TAPI functions phoneSetVolume and phoneSetGain.