| Microsoft DirectX 9.0 |
This topic applies to Windows XP Service Pack 1 only.
The KaraokeAudioPresentationMode property sets or retrieves the right-left speaker mix for the auxiliary karaoke channels.
Syntax
VidWebDVD.KaraokeAudioPresentationMode As Long
Parameters
This property takes no parameters.
Return Values
Returns a Long value containing a set of bit flags indicating how the auxiliary karaoke channels are mixed to the left and right speakers.
Remarks
This property is read/write with a default value of zero.
Audio channels are zero-based, so channels 0 and 1 generally represent the right and left speaker channels and channels 2 through 4 are the three auxiliary karaoke channels. When the MSVidWebDVD object enters karaoke mode, it automatically mutes channels 2 and higher. Use bitwise OR operations to set the appropriate bit in order to send an auxiliary channel to the left speaker, right speaker, both speakers (both bits on), or to no speakers (both bits off). These bits are all off by default when entering karaoke mode. The value of the bits and their corresponding action is given in the following table.
| Hexadecimal Value | Description |
| 0x0004 | Mix channel 2 to the left speaker. |
| 0x0008 | Mix channel 3 to the left speaker. |
| 0x0010 | Mix channel 4 to the left speaker. |
| 0x0400 | Mix channel 2 to the right speaker. |
| 0x0800 | Mix channel 3 to the right speaker. |
| 0x1000 | Mix channel 4 to the right speaker. |
Error Codes
If the property fails, Err.Number may be set to one of the following values.
| Value | Description |
| E_UNEXPECTED | Unspecified error. |
| VFW_E_DVD_INVALIDDOMAIN | You attempted to take the value in a domain that does not support this property. |
| E_NO_DVD_VOLUME | No DVD in the machine. |
| E_REGION_CHANGE_FAIL | The DVD has a different region than the player. |
| VFW_E_DVD_OPERATION_INHIBITED | Operation prevented by UOP command. |
Example
The following code example shows how to send channel 2 to the left speaker and channels 3 and 4 to the right channel by using a bitwise OR operation:
Dim lMode As Long ' lMode automatically initialized to 0.
lMode = &H4 Or &H800 Or &H1000 ' VB-style hex values.
VidWebDVD.KaraokeAudioPresentationMode = lMode
To retrieve the value of KaraokeAudioPresentationMode, use a bitwise AND operation against the possible values, as shown in the following code example:
If (VidWebDVD.KaraokeAudioPresentationMode And &H4) Then
' Channel 2 is being sent to the left speaker.
End If
If (VidWebDVD.KaraokeAudioPresentationMode And &H8) Then
' Channel 3 is being sent to the left speaker.
End If
' And so on for all possible values.
Valid Domains
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 |
| Karaoke_Audio_Presentation_Mode_Change | DVD_DOMAIN_VideoManagerMenu DVD_DOMAIN_VideoTitleSetMenu DVD_DOMAIN_Title DVD_DOMAIN_Stop |
See Also