fix RP355 support

gdigi.h

@@ -619,6 +619,8 @@ enum {
   DELAY_TYPE_MODULATED = 1047,
   DELAY_TYPE_PONG = 1048,
   DELAY_TYPE_TAPE = 1049,
+  DELAY_TYPE_ECHOPLEX = 1050,
+  DELAY_TYPE_DM = 1051,
 
   DELAY_RP500_TYPE_DIGITAL = 1052,
   DELAY_RP500_TYPE_ANALOG = 1053,
@@ -651,8 +653,10 @@ enum {
 #define DELAY_DUCK_THRESH 1889
 #define DELAY_DUCK_LEVEL 1890
 #define DELAY_REPEAT_RATE 1898
+#define DELAY_REPEAT_RATE_DM 1894
 #define DELAY_ECHO 1895
 #define DELAY_INTENSITY 1896
+#define DELAY_ECHOPLEX_TIME 1897
 #define DELAY_TIME_0_760 1899
 #define DELAY_VOLUME 1893
 #define DELAY_REPEATS_0_99 1874
@@ -704,6 +708,9 @@ enum {
 
 #define EXP_MIN 8195
 #define EXP_MAX 8196
+#define LFO_TYPE 8258
+#define LFO1_POSITION 22
+#define LFO2_POSITION 23
 
 #define LIBRARY_TONE 8704
 #define LIBRARY_EFFECTS 8705