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How many channels of audio is in the PCM; Default 2.

=item fps 

How many frames per second are going to be used for audio/visual sync. 
Overrides seek_step. No default.

=item seek_step 

How far to move forward every iteration. Overridden by fps. Default is not to do
additional seeking which will not create audio/visual synchronized output.

=item scaler

Use another scaler class besides the default Audio::Analyzer::ACurve; 
pass in either a string of the name of the class that will be scaling or undef
to perform no scaling at all. See below for information on writting your own
scaler classes. The currently available scalers are:

=over 4