TYPE: CHOP
TITLE: Audio Period CHOP

This CHOP determines the period of a possibly repeating input waveform. It
can output a single period of the waveform, or the period value (as a single
sample channel). 

The period of the waveform is determined by comparing successive cycles to
one another and computing the difference. The period with the lowest difference
is selected as the overall period of the waveform. Periodic waveforms with
constantly changing envelopes will not be detected well.

There are no local variables.

Parameters
    Channel Output   - Determines the output to produce:
        Channel Trimmed To 1 Period - Extract a single period out of the
                                      waveform.
        Period Value                - Single frame channel with the value
                                      set to the period length (in Units). 
    Min Cycle Length - The lower bound of the cycle period to detect (in Units).
    Max Cycle Length - The upper bound of the cycle period to detect (in Units).
    Test Cycles      - The number of cycles to compare against. If you get 2 or
                       3 cycles output instead of 1, increase this value. If no
                       period can be detected (period = input channel length),
                       lower this value.

See also: Audio In(audioin), Wave
