diff --git a/radio/src/Makefile b/radio/src/Makefile
index 7e49bf5ab..0fba8ef16 100644
--- a/radio/src/Makefile
+++ b/radio/src/Makefile
@@ -256,7 +256,7 @@ MENUS_LOCK == NO
 SHELL = sh
 IMG2LBM = -python ../util/img2lbm.py
 TRANSLATE = -python ../util/translate.py
-SVNREV = $(shell sh -c "svnversion | egrep -o '[[:digit:]]+[[:alpha:]]*$$'")
+VERSION = 2.0
 
 SRC =
 CPPSRC =
@@ -1063,43 +1063,43 @@ stamp_header:
 	@echo "//Automatically generated file (Makefile) - do not edit" > stamp-opentx.h
 	@echo "#define DATE_STR \"`date +%Y-%m-%d | tr -d '\r\n'`\"" >> stamp-opentx.h
 	@echo "#define TIME_STR \"`date +%H:%M:%S | tr -d '\r\n'`\"" >> stamp-opentx.h
-	@echo "#define SVN_STR  \"opentx-r$(SVNREV)\"" >> stamp-opentx.h
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx.h
 	@cat stamp-opentx.h
 
-stock-stamp:
-	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-stock.txt
-	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-stock.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-stock.txt
-	@cat stamp-opentx-stock.txt
+9x-stamp:
+	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-9x.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-9x.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-9x.txt
+	@cat stamp-opentx-9x.txt
 
-stock128-stamp:
-	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-stock128.txt
-	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-stock128.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-stock128.txt
-	@cat stamp-opentx-stock128.txt
+9x128-stamp:
+	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-9x128.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-9x128.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-9x128.txt
+	@cat stamp-opentx-9x128.txt
 
-stock2561-stamp:
-	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-stock2561.txt
-	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-stock2561.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-stock2561.txt
-	@cat stamp-opentx-stock2561.txt
+9x2561-stamp:
+	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-9x2561.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-9x2561.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-9x2561.txt
+	@cat stamp-opentx-9x2561.txt
 	
-v4-stamp:
-	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-v4.txt
-	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-v4.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-v4.txt
-	@cat stamp-opentx-v4.txt
+gruvin9x-stamp:
+	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-gruvin9x.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-gruvin9x.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-gruvin9x.txt
+	@cat stamp-opentx-9x.txt
 
-arm-stamp:
-	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-arm.txt
-	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-arm.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-arm.txt
-	@cat stamp-opentx-arm.txt
+sky9x-stamp:
+	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-sky9x.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-sky9x.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-sky9x.txt
+	@cat stamp-opentx-sky9x.txt
 
 taranis-stamp:
 	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > stamp-opentx-taranis.txt
 	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-opentx-taranis.txt
-	@echo "#define SVN_VERS \"opentx-r$(SVNREV)\"" >> stamp-opentx-taranis.txt
+	@echo "#define VERS_STR \"$(VERSION)\"" >> stamp-opentx-taranis.txt
 	@cat stamp-opentx-taranis.txt
 
 translations/cz.h: translations/cz.h.txt
diff --git a/radio/src/simpgmspace.h b/radio/src/simpgmspace.h
index cda058487..b177d82a0 100644
--- a/radio/src/simpgmspace.h
+++ b/radio/src/simpgmspace.h
@@ -359,6 +359,8 @@ void eeprom_read_block (void *pointer_ram, const void *pointer_eeprom, size_t si
 #define boardInit()
 
 #define OS_MutexID pthread_mutex_t
+extern OS_MutexID audioMutex;
+
 #define OS_FlagID int
 #define OS_TID int
 #define OS_TCID int
diff --git a/radio/src/stamp.cpp b/radio/src/stamp.cpp
index 7200b60b9..72e1208bd 100644
--- a/radio/src/stamp.cpp
+++ b/radio/src/stamp.cpp
@@ -40,7 +40,7 @@
 #define STR2(s) #s
 #define DEFNUMSTR(s)  STR2(s)
 
-const pm_char stamp1[] PROGMEM = " SVN: " SVN_STR;
+const pm_char stamp1[] PROGMEM = "VERS: " VERS_STR;
 const pm_char stamp2[] PROGMEM = "DATE: " DATE_STR;
 const pm_char stamp3[] PROGMEM = "TIME: " TIME_STR;
 #if defined(PCBSTD)