TYPE: CHOP
TITLE: Parametric EQ CHOP

This CHOP filters an audio clip, and then applies other audio effects. The
functions, in the order they are applied, are:

~c(
    Parametric Filter    - Filters any frequency range of the input.
    Sideband Filter      - Filters the input with another audio channel's
                           power spectrum (contained in the second input).
    Pitch Shift          - Shifts the pitch of an audio clip, maintaining
                           the same duration.
    Echo Generator       - Adds echoes to the audio clip.
~c)

This CHOP may be time sliced to filter audio in realtime, though pitch shifting
is not available in time slice mode.

Starred parameters (*) may be animated by the third input. These animation
channels must be named the same as the control channel names.

Parameters
Filter
    Center Frequency* - The center frequency of the filter.       /center
    Bandwidth*        - The bandwidth of the filter, in octaves.  /bandwidth
    Filter Gain*      - The audio in the frequency range of the   /filtergain
		        filter is multiplied by the Filter Gain.
    Pass Gain*        - The audio outside the frequency range of  /passgain
		        the filter is multiplied by the Pass Gain.
    Filter Shape*     - The shape of the filter. Zero is box,     /shape
		        .5 is triangular and 1 is Gaussian.
    Filter Dropoff*   - The dropoff factor of the filter shape.   /dropoff
Sideband
    Sideband Filter  - Method to use when sideband filtering.
    Filter Type      - The power spectrum of a sideband filter can
		       be used to enhance frequencies (Sideband 
		       Pass) or remove them (Sideband Stop).
    Sideband Gain    - The gain of the sideband filter.        /sidegain
    Base Gain        - The base gain of the channel.           /sidebasegain
    Sideband Effect  - The frequency effect of the filter.     /sideeffect
Pitch
    Octave Shift*     - Shifts the audio pitch up or down,       /pitchshift
		       expressed in octaves.
    Pitch Chunk      - The chunk size at which Octave Shift     /pitchchunk
		       resamples. Used to fine tune the sound
		       once the correct pitch is found.
Echo
    Pre Echoes       - The number of echoes to generate before   /prenum
		       the sound occurs (not natural).
    Pre Echo Delay   - The amount of time between echoes.        /predelay
    Pre Echo Dropoff - The strength of the audio volume of       /predrop
		       the first pre-echo (other pre-echoes
		       reduce by the same factor).
    Post Echoes      - The number of echoes to generate after    /postnum
		       the sound has occurred.
    Post Echo Delay  - Same as Pre Echo Delay.                   /postdelay
    Post Echo Dropoff - Same as Pre Echo Dropoff.                /postdrop
    Remainder        - See Remainder parameter in Copy or Trigger CHOPs.
Digital
    Filter Chunk     - Number of samples of input to process at a
		       time for parametric and sideband filters.
    Chunk Overlap    - The amount to overlap the chunks.         /overlap
    Chunk Discard    - The amount of the chunk to discard.       /discard

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

See also: Band EQ(band), Copy, Trigger
