diff --git a/radio/src/cli.cpp b/radio/src/cli.cpp
index dfb2718ec..ce2ac8b21 100644
--- a/radio/src/cli.cpp
+++ b/radio/src/cli.cpp
@@ -328,12 +328,14 @@ int cliDisplay(const char ** argv)
 int cliDebugVars(const char ** argv)
 {
 #if defined(PCBHORUS) && !defined(SIMU)
-  extern unsigned int ioMutexReq, ioMutexRel;
-  extern unsigned int sdReadRetries;
+  extern uint32_t ioMutexReq, ioMutexRel;
+  extern uint32_t sdReadRetries;
+  extern uint32_t audioBufferCount;
 
   serialPrint("ioMutexReq=%d", ioMutexReq);
   serialPrint("ioMutexRel=%d", ioMutexRel);
   serialPrint("sdReadRetries=%d", sdReadRetries);
+  serialPrint("audioBufferCount=%d", audioBufferCount);
 #endif
   return 0;
 }
diff --git a/radio/src/targets/horus/audio_driver.cpp b/radio/src/targets/horus/audio_driver.cpp
index 2d0366569..50deff5ea 100644
--- a/radio/src/targets/horus/audio_driver.cpp
+++ b/radio/src/targets/horus/audio_driver.cpp
@@ -20,6 +20,8 @@
 
 #include "../../opentx.h"
 
+uint32_t audioBufferCount = 0;
+
 #if !defined(SIMU)
 bool dacIdle = true;
 
@@ -43,9 +45,6 @@ void dacTimerInit()
   AUDIO_TIMER->CR1 = TIM_CR1_CEN ;
 }
 
-// Configure DAC0 (or DAC1 for REVA)
-// Not sure why PB14 has not be allocated to the DAC, although it is an EXTRA function
-// So maybe it is automatically done
 void dacInit()
 {
   dacTimerInit();
@@ -74,6 +73,7 @@ void dacInit()
 bool dacQueue(AudioBuffer * buffer)
 {
   if (dacIdle) {
+    audioBufferCount++;
     dacIdle = false;
     DMA1_Stream5->CR &= ~DMA_SxCR_EN ;                              // Disable DMA channel
     DMA1->HIFCR = DMA_HIFCR_CTCIF5 | DMA_HIFCR_CHTIF5 | DMA_HIFCR_CTEIF5 | DMA_HIFCR_CDMEIF5 | DMA_HIFCR_CFEIF5 ; // Write ones to clear bits
diff --git a/radio/src/targets/horus/board_horus.h b/radio/src/targets/horus/board_horus.h
index 2ae1f2fd9..5f473d46a 100644
--- a/radio/src/targets/horus/board_horus.h
+++ b/radio/src/targets/horus/board_horus.h
@@ -284,7 +284,7 @@ void setSampleRate(uint32_t frequency);
 // Fake volume driver
 #define setScaledVolume(...)
 #define setVolume(...)
-#define getVolume(...)                 (-1)
+#define getVolume(...) (-1)
 
 // Telemetry driver
 void telemetryPortInit(uint32_t baudrate);
diff --git a/radio/src/targets/horus/diskio.cpp b/radio/src/targets/horus/diskio.cpp
index 139382d2e..91441a4b9 100644
--- a/radio/src/targets/horus/diskio.cpp
+++ b/radio/src/targets/horus/diskio.cpp
@@ -1,23 +1,23 @@
-/*
- * Copyright (C) OpenTX
- *
- * Based on code named
- *   th9x - http://code.google.com/p/th9x 
- *   er9x - http://code.google.com/p/er9x
- *   gruvin9x - http://code.google.com/p/gruvin9x
- *
- * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
+/*
+ * Copyright (C) OpenTX
+ *
+ * Based on code named
+ *   th9x - http://code.google.com/p/th9x 
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
 /* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2007        */
 /*-----------------------------------------------------------------------*/
 /* This is a stub disk I/O module that acts as front end of the existing */
@@ -36,7 +36,7 @@
 /*-----------------------------------------------------------------------*/
 #if !defined(BOOT)
 static OS_MutexID ioMutex;
-unsigned int ioMutexReq = 0, ioMutexRel = 0;
+uint32_t ioMutexReq = 0, ioMutexRel = 0;
 int ff_cre_syncobj (BYTE vol, _SYNC_t *mutex)
 {
   *mutex = ioMutex;
@@ -107,7 +107,7 @@ DSTATUS disk_status (
   return(stat);
 }
 
-unsigned int sdReadRetries = 0;
+uint32_t sdReadRetries = 0;
 
 /*-----------------------------------------------------------------------*/
 /* Read Sector(s)                                                        */
diff --git a/radio/src/targets/horus/hal.h b/radio/src/targets/horus/hal.h
index 091023d03..bff7b6ab1 100644
--- a/radio/src/targets/horus/hal.h
+++ b/radio/src/targets/horus/hal.h
@@ -211,6 +211,8 @@
 #define AUDIO_RCC_APB1Periph            (RCC_APB1ENR_TIM6EN | RCC_APB1ENR_DACEN)
 #define AUDIO_TIMER                     TIM6
 #define AUDIO_TIMER_DAC_IRQn            TIM6_DAC_IRQn
+#define AUDIO_DMA_STREAM                DMA1_Stream5
+#define AUDIO_DMA_IRQn                  DMA1_Stream5_IRQn
 
 // I2C Bus: TPL0401A-10DCK digital pot for volume control
 #define I2C_RCC_AHB1Periph              RCC_AHB1Periph_GPIOB
diff --git a/radio/src/targets/simu/simpgmspace.cpp b/radio/src/targets/simu/simpgmspace.cpp
index 282718df8..b8480adc1 100644
--- a/radio/src/targets/simu/simpgmspace.cpp
+++ b/radio/src/targets/simu/simpgmspace.cpp
@@ -1344,4 +1344,7 @@ void serialPrintf(const char * format, ...) { }
 void serialCrlf() { }
 void serialPutc(char c) { }
 uint16_t stackSize() { return 0; }
+
+#if defined(VOLUME_CHIP)
 int32_t getVolume() { return 0; }
+#endif
\ No newline at end of file