|Microsoft DirectX 9.0|
The SelectKaraokeAudioPresentationMode method sends karaoke auxiliary channels to the left or right speakers.
HRESULT SelectKaraokeAudioPresentationMode( ULONG ulMode );
[in] Bitwise OR of DVD_KARAOKE_DOWNMIX enumeration indicating how to downmix the five karaoke channels to channels 0 and 1, which are usually output to the left and right speakers.
Returns one of the following values.
|VFW_E_DVD_INVALIDDOMAIN||The DVD Navigator filter is in an invalid domain.|
|VFW_E_DVD_OPERATION_INHIBITED||UOP control prohibits the current operation.|
When the DVD Navigator enters karaoke mode, it queries the audio decoder to discover whether it supports karaoke downmixing. If the decoder supports it, then channels 2 through 4 (the karaoke auxiliary channels with the guide vocals, guide melodies, and sound effects) are muted. Use this method to turn individual channels on or off and direct them to channels 0 and 1.
This method is demonstrated in the DVDSample application in CKaraokeDlg::DoModal.
The following table shows the Annex J command name to which this method name corresponds, and the domains in which this method is valid.
|Annex J Command Name||Valid Domains|