TYPE: CHOP
TITLE: Stretch CHOP

This CHOP preserves the shape of channels and the sampling rate, but
resamples the channels into a new interval. All data in the range
is stretched or compressed to the new start and end positions.

Parameters:
    Interpolation    - The interpolation method to use when resampling.
        No Interpolation - Use the value of the nearest sample.
        Linear           - Use linear interpolation between samples if
                           CHOP is being lengthened. Averages all samples
                           near the new sample if CHOP is being shortened.
        Cubic            - Cubically interpolates between samples, for
                           smoother curves than Linear. This method is
                           not recommended for channels with sharp changes.
        Pulse Preserve   - A linear interpolation that recognizes single
                           sample pulses and preserves their height and
                           one sample width. A pulse is a non-zero value
                           preceded and followed by zero-value samples.
    Constant Area    - If on, keeps the area under the channel constant
                       by scaling the the values of the channel.
    Unit Values      - Determines how Start/End parameters are interpreted.
        Absolute              - The value is the new start/end position.
        Relative to Start/End - The value is a shift from the old 
                                start/end position.
    Start            - The CHOP's new start position.              /start
    End              - The CHOP's new end position.                /end
    Length Scale     - Scales the length of the channel after      /scale
                       determining the start/end interval.
                       Good for doubling or halving the length.
    Reverse Interval - Reverses the channel so that it plays
                       backwards.

Local Variables
    C   - The current channel (0 to NC-1).
    NC  - The total number of channels.

See also: Resample, Trim
