Copyright © 2005-2018 MultiMedia Soft

Effects.PlaybackTempoSet method

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Remarks

 

Changes the sound to play at faster or slower speed than original, without affecting the sound pitch so voices won't result altered. The current tempo percentage can be obtained through the Effects.PlaybackTempGet method. The current effective playback rate ratio, that may be also affected by the Effects.PlaybackRateSet method, can be obtained through the Effects.PlaybackRateRatioGet method.

 

This method doesn't work with sounds with more than 2 channels (5.1 or 7.1) or if the EnableMixingFeatures property has been set to false.

 

When dealing with video clips, calls to this method will have no effect if the video clip has not been loaded with the VideoPlayer.LoadForTempoChange, VideoPlayer.LoadFromMemoryForTempoChange, VideoPlayer.LoadFromMemorySyncForTempoChange or VideoPlayer.LoadSyncForTempoChange methods.

 

After a successful call to this method, the duration of the song will change: the new duration, expressed in seconds, is notified through the SoundDurationChanged event. The new duration can also be obtained through the SoundDurationGet and SoundDurationStringGet methods by setting the bKeepCountOfRateChange parameter to "true".

 

Further details about songs mixing can be found inside the How to mix your songs section.

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

 

 

Syntax

 

[Visual Basic]

Public Function PlaybackTempoSet (

nPlayerIndex as Int16,

fTempoPerc As Single

) as enumErrorCodes


 

[C#]

public enumErrorCodes PlaybackTempoSet (

Int16 nPlayerIndex,

float fTempoPerc

);


 

[C++]

public: enumErrorCodes PlaybackTempoSet (

Int16 nPlayerIndex,

float fTempoPerc

);


 

 

Parameter

Description

 

 

nPlayerIndex

Number representing the zero-based index of the involved player

fTempoPerc

The Tempo variation expressed in percentage; supported values are from -90 to 90.

Setting this parameter to 0 will set the original sound tempo value.

Usually best mixing results are obtained with values from -15 to 15.

 

 

Return value

 

Value

Meaning

 

 

Negative value

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

enumErrorCodes.NOERROR (0)

The method call was successful.