vi: reduce amplitude of phoneme a

phsource/ph_vietnam

@@ -62,7 +62,7 @@ phoneme a
 	IF nextPh(N) OR nextPh(c) THEN
 	FMT(vnasal/a_n)
 	ELSE
-	FMT(vietnam/a)  //a_4)
+	FMT(vietnam/a, 60)  //a_4)
 	//FMT(vietnam/a_x)
 	ENDIF
 endphoneme
@@ -170,7 +170,7 @@ phoneme u
 	ELSE
 	length 180
 	ENDIF
-  FMT(vnasal/u_n,60) //vowel/u_5)
+  FMT(vnasal/u_n) //vowel/u_5)
 endphoneme
 
 phoneme y