add multichorus cmd

doc/README.md

@@ -312,8 +312,28 @@ GVerb algorithm from SWH plugins.
  - t4d (tap 4 distance, inches): 0..4, default 3
  - t4a\_db (tap 4 level, dB): -90..0, default -90
 
-## `moddelay split index`
+## `moddelay split index base`
 
 > A delay whose tap can be modulated at audio rate.
 
  - base (base delay, seconds): 0..1, default 1
+
+## `multichorus split index min_delay mod_depth mod_rate stereo voices vphase amount dry freq freq2 q overlap level_in level_out lfo`
+
+Calf Multi Chorus
+
+ - `min_delay` (ms): 0.1..10, default 5
+ - `mod_depth` (ms): 0.1..10, default 6
+ - `mod_rate` (hz): 0.1..20, default 0.1
+ - `stereo` (degrees): 0..360, default 180
+ - `voices`: 1..8, default 4
+ - `vphase` (inter-voice phase, degrees): 0..360, default 64
+ - `amount`: 0..4, default 0.5
+ - `dry`: 0..4, default 0.5
+ - `freq` (center frq 1, hz): 10..20000, default 100
+ - `freq2` (center frq 2, hz): 10..20000, default 5000
+ - `q` (???): 0.125..8, default 0.125
+ - `overlap`: 0..1, default 0.75
+ - `level_in` (Input Gain): 0.0156250..64, default 1
+ - `level_out` (Output Gain): 0.0156250..64, default 1
+ - `lfo` (toggle): 0..1, default 1