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ISpMMSysAudio::GetLineId

ISpMMSysAudio::GetLineId retrieves the current line identifier associated with the multimedia device. Mixer lines are not supported for output devices.

HRESULT GetLineId(
   UINT   *puLineId
);

Parameters

puLineId

[out] Address of the structure that receives the line identifier information.

Return values

Remarks

For more information on the uses of device lines, please see the Win32 multimedia mixer API (e.g., mixerOpen, mixerGetId, mixerGetLineInfo, etc.)

For input devices, SAPI will attempt to automatically identify the microphone line on the input device. On non-English versions of Windows and on a small number of English systems, it may not be possible for SAPI to automatically detect the correct microphone line. In this case, no error will be detected or returned. In such cases, if speech input is not correctly detected, the user must set the microphone input line directly using Control Panel-->Speech properties-->Speech Recognition tab-->Audio Settings-->Properties. In particular, this may be necessary to adjust the microphone input line used on devices with multiple microphone inputs such as the SoundBlaster Live Platinum as the automatically chosen line may not be the input preferred by the user.