Add backward compatibility with MODE param on Random.

src/Random.cpp

@@ -6,7 +6,7 @@ struct Random : Module {
 		RATE_PARAM,
 		SHAPE_PARAM,
 		OFFSET_PARAM,
-		MODE_PARAM,
+		MODE_PARAM, // removed in 2.0
 		// new in 2.0
 		PROB_PARAM,
 		RAND_PARAM,
@@ -233,7 +233,15 @@ struct Random : Module {
 		params[SHAPE_CV_PARAM].setValue(1.f);
 		params[PROB_CV_PARAM].setValue(1.f);
 		params[RAND_CV_PARAM].setValue(1.f);
+		// In <2.0, mode=0 implied relative mode, corresponding to about 20% RND.
+		params[RAND_PARAM].setValue(0.2f);
 		Module::paramsFromJson(rootJ);
+
+		// In <2.0, mode was used for absolute/relative mode. RND is a generalization so set it if mode is enabled.
+		if (params[MODE_PARAM].getValue() > 0.f) {
+			params[MODE_PARAM].setValue(0.f);
+			params[RAND_PARAM].setValue(1.f);
+		}
 	}
 };