View source for MixAudio

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{{FuncDef
|MixAudio(clip ''clip1'', clip ''clip2'', float ''clip1_factor'', float ''clip2_factor'')
}}

Mixes audio from two clips. A ''volume factor'' for the two clips can be given, but is optional. 

:{{Par2|clip1, clip2|clip|}}
::Source clips. Output video is copied from {{FuncArg|clip1}}.

:{{Par2|clip1_factor, clip2_factor|float|(auto)}}
::Set the volume of each clip's audio, where 0.0 is no audio from that clip, and 1.0 is 100% audio. 
::Default is 0.5/0.5; if only one factor is given, the other will be 1.0-(factor). 
::If {{FuncArg|clip1_factor}}+{{FuncArg|clip2_factor}} > 1.0, you risk clipping your signal if sample type is not [[Float]].

The sample rate of the two clips needs to be the same &ndash; use [[ResampleAudio]] if necessary. 

Your clips need to have the same number of channels &ndash; use [[ConvertToMono]], [[MonoToStereo]] or [[MergeChannels]] if necessary. 


'''Example:'''
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 # mixes two sources, with one source slightly lower than the other.
 video = AviSource("c:\movie.avi")
 Soundtrack = WavSource("c:\soundtrack.wav")
 Speak = WavSource("c:\speak.wav")
 audio = MixAudio(Soundtrack, Speak, 0.75, 0.25)  
 # (the Expert may notice that the last 0.25 is actually redundant here)
 return AudioDub(video, audio)
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[[Category:Internal filters]]
[[Category:Audio_filters]]