IVDctNotifySink::VU Meter

HRESULT VUMeter(WORD wLevel);

Notifies the application of the current VU level, which indicates the loudness of the digital-audio stream.

· Return value is ignored.

wLevel

[in] Value from 0 to 0xFFFF that indicates a linear level. 0xFFFF is the loudest volume that the VU meter can register.

The VU level returned by this function is only a rough estimate used to display a visual indicator on the screen. The engine sends this notification about eight times per second.

The notification is sent only to applications that set the dwFlags parameter of the IVoiceDictation::Register member function to the VDCTRF_ALLMESSAGES value when the application registered to use voice commands on the site.