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SoundComposer.SessionComposeItems method

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Composes all of the items added to the session, previously created through the SoundComposer.SessionInit method, by mixing them on the given channels and positions.


During the execution of the session the CallbackPercentage delegate is invoked, with the nOperation parameter set to OPERATION_SOUND_COMPOSER, in order to notify about the percentage of advancement of the session itself.


For further details about sound composing see the the SoundComposerMan class and the How to compose a sound tutorial.





[Visual Basic]

Public Function SessionComposeItems (

) as enumErrorCodes



public enumErrorCodes SessionComposeItems (




public: enumErrorCodes SessionComposeItems (




Return value






Negative value

An error occurred, check the LastError property value in order to see the error code meaning

enumErrorCodes.ERR_NOERROR (0)

The method call was successful.