Copyright © 2005-2018 MultiMedia Soft

Effects.MPXEnable method

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Enables/disables the application of the MPX (Multiplex) DSP effect on the playing sound. A sound must be already loaded inside the given player before applying this method.


Multiplex is a type of Karaoke software that has specially formatted left and right channels to make multiplex features available. To be formatted for multiplex use, a disc must have the vocals coded to the right channel and the music to the left channel. When you enable the use of the MPX DSP, the control will attenuate/remove the right channel (vocals) and split the left channel (music) to both sides. Attenuation removal of the vocal channel can be fine-tuned using the Effects.MPXSetVocalAttenuation method.


With some special MPX file there may be the need to invert channels management: this can be done using the Effects.MPXInvertChannels method.


See the How to apply special effects to a playing sound section for further details.






[Visual Basic]

Public Function MPXEnable (

nPlayerIndex as Int16,

bEnable as Boolean

) as enumErrorCodes



public enumErrorCodes MPXEnable (

Int16 nPlayerIndex,

bool bEnable




public: enumErrorCodes MPXEnable (

Int16 nPlayerIndex,

bool bEnable









Number representing the zero-based index of the involved player


Boolean value that specifies if the control must apply or not the MPX DSP.

Supported values are the following:

Mnemonic constant


false (default)

MPX DSP is disabled


MPX DSP is enabled



Return value






Negative value

An error occurred (see the LastError property for further error details)

enumErrorCodes.NOERROR (0)

The method call was successful.