Apply dry gain when no notes are playing

Author: geraintluff

Soft-Bell.jsfx

@@ -240,6 +240,9 @@ synth_sample() ? (
 
 	spl0 = output_wet*left + output_dry*spl0;
 	spl1 = output_wet*right + output_dry*spl1;
+) : (
+	spl0 *= output_dry;
+	spl1 *= output_dry;
 );