diff -u --recursive festival-vanilla/lib/festival.scm festival/lib/festival.scm

--- festival-vanilla/lib/festival.scm	2018-07-22 17:42:03.513767269 -0400

+++ festival/lib/festival.scm	2018-07-22 18:53:25.698493760 -0400

@@ -33,6 +33,10 @@

 ;;;  General Festival Scheme specific functions

 ;;;  Including definitions of various standard variables.

+(Parameter.set 'Audio_Required_Format 'aiff)

+(Parameter.set 'Audio_Method 'Audio_Command)

+(Parameter.set 'Audio_Command "paplay $FILE --client-name=Festival --stream-name=Speech")

+

 ;; will be set automatically on start-up

 (defvar festival_version "unknown"

   "festival_version