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TrimSilence method

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Detects and removes silent portions found at the beginning and at the end of the loaded sound.

In order to remove any portions of silence from the loaded sound you should use the RemoveSilence method.

During the execution of the editing session the CallbackEditPerc delegate is invoked in order to notify about the percentage of advancement.


For further details about callback delegates see the How to synchronize the container application with the API tutorial.





[Visual Basic]

Public Function TrimSilence (

nSilenceThreshold as Int16

) as enumErrorCodes



public enumErrorCodes TrimSilence (

Int16 nSilenceThreshold




public: enumErrorCodes TrimSilence (

Int16 nSilenceThreshold









Number representing the silence threshold referred to the volume level. Supported values are expressed with a linear volume in the range from 0 to 32767. If for example you should set a value of 800, any portion of sound having a volume level lower than 800 would be considered as silent.

In case you should need to set a threshold value expressed in dB, before setting this parameter you could convert the value in dB into a linear value through the following formula (C syntax):


ValueLinear = 32767 * pow (10, ValueInDB/20);


In case you should need to define different thresholds for the initial and final portions of the recorded sound, use the TrimSilenceEnhanced method.



Return value






Negative value

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

enumErrorCodes.ERR_NOERROR (0)

The method call was successful.