avfilter/af_adynamicequalizer: add precision option

doc/filters.texi

@@ -1107,6 +1107,20 @@ Stop picking threshold value.
 @item on
 Start picking threshold value.
 @end table
+
+@item precision
+Set which precision to use when processing samples.
+
+@table @option
+@item auto
+Auto pick internal sample format depending on other filters.
+
+@item float
+Always use single-floating point precision sample format.
+
+@item double
+Always use double-floating point precision sample format.
+@end table
 @end table
 
 @subsection Commands