SayHelp screen 3: Speech filters.      [Speech filters modify 'spoken' text]
A filter is a MUF program which processes your speech. The replace filter
is probably the most useful to the casual user; see sayhelp 4's example.
To add a filter to <ch>:           sayfilter <ch> fadd <filter-name/dbint>
To remove a filter from <ch>:      sayfilter <ch> ftake.n
                                or sayfilter <ch> ftake <filter-name>
To list all filters on <ch>:       sayfilter <ch> flist
To list all registered filters:    sayfilter 
To get help from a filter:         sayhelp <filter-name/dbinteger> 1,2,3...
You may stack filters, but filter operations are not generally commutative.
 A <ch> macro will use default's filters if it has no filter of its own set.
                                 Giving it the filter 'Null' will stop this.
Example: sayfilter flist
         def/filter/1: RandomSplit
         def/filter/2: Replace
         def/filter/3: db#38748
         sayfilter ftake.2         [Removes filter number 2]
      or sayfilter ftake replace   [Removes earliest 'replace' filter, ie 2]
For more help, type 'sayhelp 4'