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Effects.PlaybackRateApply method

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Remarks

 

Applies a Playback Rate change to the given portion of sound under editing. A change to the playback rate will cause a change to both sound tempo and pitch, as if an LP disc was played at wrong RPM rate. The use of this method will speed up/down the sound playback, the sound duration will be altered and voices will result altered also; if you don't want to alter voices, use the Effects.TempoApply method.

 

A successful call to this method will fire the SoundEditStarted event followed by a number of SoundEditPerc events and finally by the SoundEditDone event.

 

For further details about methods related to the use of special effects refer to the Effects COM object.

 

 

Syntax

 

[Visual Basic]

control.Effects.PlaybackRateApply (

nStartPosition as Long,

nEndPosition as Long,

fPlaybackRatePerc as Single

) as enumErrorCodes


 

[C++]

short control.Effects.PlaybackRateApply (

long nStartPosition,

long nEndPosition,

float fPlaybackRatePerc

);


 

 

Parameter

Description

 

 

nStartPosition

Start position, expressed in milliseconds, of the affected sound range.

nEndPosition

End position, expressed in milliseconds, of the affected sound range.. If set to -1 the end position will be set to the end of the sound.

fPlaybackRatePerc

Playback Rate increment/decrement expressed in percentage. Supported values are from -90 to 90.

 

 

Return value

 

Value

Meaning

 

 

Negative value

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

enumErrorCodes.ERR_NOERROR (0)

The method call was successful.