diff --git a/platform/drivers/audio/audio_Mod17.c b/platform/drivers/audio/audio_Mod17.c
index 8e87d609..f0fde98c 100644
--- a/platform/drivers/audio/audio_Mod17.c
+++ b/platform/drivers/audio/audio_Mod17.c
@@ -42,9 +42,9 @@ static const uint8_t pathCompatibilityMatrix[9][9] =
 
 const struct audioDevice outputDevices[] =
 {
-    {NULL,                    0,                   0,             SINK_MCU},
-    {&stm32_dac_audio_driver, (const void *) 2048, STM32_DAC_CH1, SINK_RTX},
-    {&stm32_dac_audio_driver, 0,                   STM32_DAC_CH2, SINK_SPK},
+    {NULL,                    0, 0,             SINK_MCU},
+    {&stm32_dac_audio_driver, 0, STM32_DAC_CH1, SINK_RTX},
+    {&stm32_dac_audio_driver, 0, STM32_DAC_CH2, SINK_SPK},
 };
 
 const struct audioDevice inputDevices[] =
@@ -67,8 +67,8 @@ void audio_init()
     gpio_clearPin(MIC_MUTE);    // Off  = logic low
     max9814_setGain(0);         // 40 dB gain
 
-    stm32dac_init(STM32_DAC_CH1);
-    stm32dac_init(STM32_DAC_CH2);
+    stm32dac_init(STM32_DAC_CH1, 2048);
+    stm32dac_init(STM32_DAC_CH2, 2048);
     stm32adc_init(STM32_ADC_ADC2);
 }
 
diff --git a/platform/drivers/audio/stm32_dac.cpp b/platform/drivers/audio/stm32_dac.cpp
index cebbc252..0688a121 100644
--- a/platform/drivers/audio/stm32_dac.cpp
+++ b/platform/drivers/audio/stm32_dac.cpp
@@ -110,7 +110,7 @@ void __attribute__((used)) DMA1_Stream6_IRQHandler()
 
 
 
-void stm32dac_init(const uint8_t instance)
+void stm32dac_init(const uint8_t instance, const uint16_t idleLevel)
 {
     // Enable peripherals
     RCC->APB1ENR |= RCC_APB1ENR_DACEN;
@@ -122,6 +122,7 @@ void stm32dac_init(const uint8_t instance)
             RCC->APB1ENR |= RCC_APB1ENR_TIM6EN;
             __DSB();
 
+            DAC->DHR12R1 = idleLevel;
             DAC->CR |= DAC_CR_DMAEN1    // Enable DMA
                     | 0x00              // TIM6 as trigger source for CH1
                     | DAC_CR_TEN1       // Enable trigger input
@@ -134,6 +135,7 @@ void stm32dac_init(const uint8_t instance)
             RCC->APB1ENR |= RCC_APB1ENR_TIM7EN;
             __DSB();
 
+            DAC->DHR12R2 = idleLevel;
             DAC->CR |= DAC_CR_DMAEN2    // Enable DMA
                     | DAC_CR_TSEL2_1    // TIM7 as trigger source for CH2
                     | DAC_CR_TEN2       // Enable trigger input
@@ -145,6 +147,7 @@ void stm32dac_init(const uint8_t instance)
             break;
     }
 
+    chState[instance].idleLevel = idleLevel;
     chState[instance].stream.setEndTransferCallback(std::bind(stopTransfer, instance));
 }
 
@@ -169,6 +172,8 @@ void stm32dac_terminate()
 static int stm32dac_start(const uint8_t instance, const void *config,
                           struct streamCtx *ctx)
 {
+    (void) config;
+
     if((ctx == NULL) || (ctx->running != 0))
         return -EINVAL;
 
@@ -181,7 +186,6 @@ static int stm32dac_start(const uint8_t instance, const void *config,
 
     ctx->priv = &chState[instance];
     chState[instance].ctx = ctx;
-    chState[instance].idleLevel = reinterpret_cast< uint32_t >(config);
 
     /*
      * Convert buffer elements from int16_t to unsigned 12 bit values as required
diff --git a/platform/drivers/audio/stm32_dac.h b/platform/drivers/audio/stm32_dac.h
index 1401b00c..57586381 100644
--- a/platform/drivers/audio/stm32_dac.h
+++ b/platform/drivers/audio/stm32_dac.h
@@ -60,8 +60,9 @@ extern const struct audioDriver stm32_dac_audio_driver;
  * Initialize the driver and the peripherals.
  *
  * @param instance: DAC instance number.
+ * @param idleLevel: DAC output level when idle.
  */
-void stm32dac_init(const uint8_t instance);
+void stm32dac_init(const uint8_t instance, const uint16_t idleLevel);
 
 /**
  * Shutdown the driver and the peripherals.