diff --git a/src/ersky9x/audio.cpp b/src/ersky9x/audio.cpp
index b515519c4..c984fb040 100644
--- a/src/ersky9x/audio.cpp
+++ b/src/ersky9x/audio.cpp
@@ -77,7 +77,7 @@ extern uint16_t Sine_values[];
 
 void audioTask(void* pdata)
 {
-#ifndef SIMU
+#if defined(SDCARD) && !defined(SIMU)
   static FIL wavFile;
 #endif
 
@@ -86,7 +86,7 @@ void audioTask(void* pdata)
 
     audioState = 1; // TODO #define
 
-#ifndef SIMU
+#if defined(SDCARD) && !defined(SIMU)
     if (toneWavFile[0]) {
       FRESULT result = FR_OK;
       UINT read;
@@ -205,20 +205,24 @@ void play(uint8_t tFreq, uint8_t tLen, uint8_t tPause,
     tone2Freq = tFreq;
     tone2TimeLeft = tLen;
     tone2Pause = tPause;
-    if (audioState == 0) CoSetFlag(audioFlag);
+    if (audioState == 0) {
+      audioState = 1;
+      CoSetFlag(audioFlag);
+    }
   }
   else {
     if (tFreq > 0) { //we dont add pitch if zero as this is a pause only event
       tFreq += g_eeGeneral.speakerPitch + BEEP_OFFSET; // add pitch compensator
     }
     tLen = getToneLength(tLen);
-    if ((tFlags & PLAY_NOW) || (audioState == 0 && audioEmpty())) {
+    if ((tFlags & PLAY_NOW) || !audioBusy()) {
       toneWavFile[0] = '\0';
       toneFreq = tFreq;
       toneTimeLeft = tLen;
       tonePause = tPause;
       toneFreqIncr = tFreqIncr;
       t_queueWidx = t_queueRidx;
+      audioState = 1;
       CoSetFlag(audioFlag);
     }
     else {
@@ -258,7 +262,7 @@ void audioEvent(uint8_t e, uint8_t f)
   }
 
   if (g_eeGeneral.beeperMode>0 || (g_eeGeneral.beeperMode==0 && e>=AU_TRIM_MOVE) || (g_eeGeneral.beeperMode>=-1 && e<=AU_ERROR)) {
-    if (e < AU_FRSKY_FIRST || audioEmpty()) {
+    if (e < AU_FRSKY_FIRST || !audioBusy()) {
       switch (e) {
         // inactivity timer alert
         case AU_INACTIVITY:
@@ -266,7 +270,7 @@ void audioEvent(uint8_t e, uint8_t f)
           break;
         // low battery in tx
         case AU_TX_BATTERY_LOW:
-          if (audioEmpty()) {
+          if (!audioBusy()) {
             play(60, 40, 6, 2, 1);
             play(80, 40, 6, 2, -1);
           }
diff --git a/src/ersky9x/audio.h b/src/ersky9x/audio.h
index df84284f8..efca63275 100644
--- a/src/ersky9x/audio.h
+++ b/src/ersky9x/audio.h
@@ -35,19 +35,18 @@
 #ifndef audio_h
 #define audio_h
 
-#define AUDIO_QUEUE_LENGTH (100) 
+#define AUDIO_QUEUE_LENGTH (20)
 #define BEEP_DEFAULT_FREQ  (70)
 #define BEEP_OFFSET        (10)
 #define BEEP_KEY_UP_FREQ   (BEEP_DEFAULT_FREQ+5)
 #define BEEP_KEY_DOWN_FREQ (BEEP_DEFAULT_FREQ-5)
-#define TONE1_RATE_LIMIT (10)
-#define TONE2_RATE_LIMIT (10)
+
+extern uint8_t audioState;
 
 extern uint8_t t_queueRidx;
 extern uint8_t t_queueWidx;
 
 extern uint8_t toneFreq;
-//int8_t toneFreqIncr;
 extern uint8_t toneTimeLeft;
 extern uint8_t tonePause;
 
@@ -73,25 +72,17 @@ void pause(uint8_t tLen);
 
 inline bool audioBusy()
 {
-  return (toneTimeLeft > 0);
+  return (audioState != 0);
 }
 
 void audioEvent(uint8_t e, uint8_t f=BEEP_DEFAULT_FREQ);
 
-inline bool audioEmpty()
-{
-  return (t_queueRidx == t_queueWidx);
-}
-
 #define AUDIO_KEYPAD_UP()   audioEvent(AU_KEYPAD_UP)
 #define AUDIO_KEYPAD_DOWN() audioEvent(AU_KEYPAD_DOWN)
 #define AUDIO_MENUS()       audioEvent(AU_MENUS)
 #define AUDIO_WARNING1()    audioEvent(AU_WARNING1)
 #define AUDIO_WARNING2()    audioEvent(AU_WARNING2)
 #define AUDIO_ERROR()       audioEvent(AU_ERROR)
-
-#define IS_AUDIO_BUSY()     audioBusy()
-
 #define AUDIO_TIMER_30()    audioEvent(AU_TIMER_30)
 #define AUDIO_TIMER_20()    audioEvent(AU_TIMER_20)
 #define AUDIO_TIMER_10()    audioEvent(AU_TIMER_10)
diff --git a/src/lcd.cpp b/src/lcd.cpp
index fc901c345..c78fed734 100644
--- a/src/lcd.cpp
+++ b/src/lcd.cpp
@@ -426,7 +426,7 @@ void lcd_filled_rect(uint8_t x, int8_t y, uint8_t w, uint8_t h, uint8_t pat, uin
 {
   for (int8_t i=y; i<y+h; i++) {
     if (i>=0 && i<64) lcd_hlineStip(x, i, w, pat, att);
-    if (pat != 0xff) pat = ~pat;
+    pat = (pat >> 1) + ((pat & 1) << 7);
   }
 }
 
diff --git a/src/pulses_arm.cpp b/src/pulses_arm.cpp
index 7b425e3a0..598980408 100644
--- a/src/pulses_arm.cpp
+++ b/src/pulses_arm.cpp
@@ -510,7 +510,7 @@ void setupPulses()
         init_ssc();
         break;
       case PROTO_NONE:
-        init_main_ppm(3000, 0); // Initial period 1.5 mS, output on
+        init_main_ppm(3000, 0); // Initial period 1.5 mS, output off
         break;
       default:
         init_main_ppm(3000, 1); // Initial period 1.5 mS, output on