diff --git a/radio/src/targets/common/arm/stm32/h7/CMakeLists.txt b/radio/src/targets/common/arm/stm32/h7/CMakeLists.txt
index e6f7f3be5..1306a2562 100644
--- a/radio/src/targets/common/arm/stm32/h7/CMakeLists.txt
+++ b/radio/src/targets/common/arm/stm32/h7/CMakeLists.txt
@@ -47,6 +47,7 @@ if(NOT NATIVE_BUILD)
       ${STM32CUBE_SRC_PREFIX}_hal_rtc.c
       ${STM32CUBE_SRC_PREFIX}_hal_i2c.c
       ${STM32CUBE_SRC_PREFIX}_hal_i2c_ex.c
+      ${STM32CUBE_SRC_PREFIX}_hal_i2s.c
       ${STM32CUBE_SRC_PREFIX}_hal_sd.c
       ${STM32CUBE_SRC_PREFIX}_hal_dma.c
       ${STM32CUBE_SRC_PREFIX}_hal_pcd.c
@@ -87,6 +88,7 @@ if(NOT NATIVE_BUILD)
       ${STM32CUBE_SRC_PREFIX}_hal_rtc.c
       ${STM32CUBE_SRC_PREFIX}_hal_i2c.c
       ${STM32CUBE_SRC_PREFIX}_hal_i2c_ex.c
+      ${STM32CUBE_SRC_PREFIX}_hal_i2s.c
       ${STM32CUBE_SRC_PREFIX}_hal_sd.c
       ${STM32CUBE_SRC_PREFIX}_hal_dma.c
       ${STM32CUBE_SRC_PREFIX}_hal_mdma.c
diff --git a/radio/src/targets/common/arm/stm32/stm32_dma.h b/radio/src/targets/common/arm/stm32/stm32_dma.h
index 7dccea892..f12b4a849 100644
--- a/radio/src/targets/common/arm/stm32/stm32_dma.h
+++ b/radio/src/targets/common/arm/stm32/stm32_dma.h
@@ -34,12 +34,16 @@
 
 inline static bool stm32_dma_check_tc_flag(DMA_TypeDef* DMAx, uint32_t DMA_Stream)
 {
-  return LL_DMA_IsActiveFlag_TC(DMAx, DMA_Stream);
+  if (!LL_DMA_IsActiveFlag_TC(DMAx, DMA_Stream)) return false;
+  LL_DMA_ClearFlag_TC(DMAx, DMA_Stream);
+  return true;
 }
 
 inline static bool stm32_dma_check_ht_flag(DMA_TypeDef* DMAx, uint32_t DMA_Stream)
 {
-  return LL_DMA_IsActiveFlag_HT(DMAx, DMA_Stream);
+  if (!LL_DMA_IsActiveFlag_HT(DMAx, DMA_Stream)) return false;
+  LL_DMA_ClearFlag_HT(DMAx, DMA_Stream);
+  return true;
 }
 
 #else // STM32H7RS
diff --git a/radio/src/targets/common/arm/stm32/stm32_i2s.cpp b/radio/src/targets/common/arm/stm32/stm32_i2s.cpp
new file mode 100644
index 000000000..73b6ed30e
--- /dev/null
+++ b/radio/src/targets/common/arm/stm32/stm32_i2s.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   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.
+ */
+
+#include "stm32_i2s.h"
+#include "stm32_gpio.h"
+#include "stm32_spi.h"
+#include "stm32_dma.h"
+
+#include "hal/gpio.h"
+
+#include "stm32_hal_ll.h"
+
+static void i2s_gpio_init(const stm32_i2s_t* i2s)
+{
+  stm32_i2s_pindef_t gpios[] = {
+      i2s->MCK, i2s->WS, i2s->CK, i2s->SDO, i2s->SDI,
+  };
+
+  for (unsigned i = 0; i < sizeof(gpios) / sizeof(gpios[0]); i++) {
+    gpio_init_af(gpios[i].pin, gpios[i].af, GPIO_PIN_SPEED_VERY_HIGH);
+  }
+}
+
+static void i2s_dma_init(const stm32_i2s_t* i2s)
+{
+  stm32_dma_enable_clock(i2s->DMA);
+
+  LL_DMA_DeInit(i2s->DMA, i2s->DMA_Stream);
+
+  LL_DMA_InitTypeDef dmaInit;
+  LL_DMA_StructInit(&dmaInit);
+
+#if defined(STM32H7)
+  dmaInit.Mode = LL_DMA_MODE_CIRCULAR;
+  dmaInit.PeriphRequest = i2s->DMA_PeriphRequest;
+  dmaInit.Direction = LL_DMA_DIRECTION_MEMORY_TO_PERIPH;
+  dmaInit.Priority = LL_DMA_PRIORITY_VERYHIGH;
+  dmaInit.PeriphOrM2MSrcAddress = LL_SPI_DMA_GetTxRegAddr(i2s->SPIx);
+  dmaInit.PeriphOrM2MSrcDataSize = LL_DMA_PDATAALIGN_HALFWORD;
+  dmaInit.MemoryOrM2MDstIncMode = LL_DMA_MEMORY_INCREMENT;
+  dmaInit.MemoryOrM2MDstDataSize = LL_DMA_MDATAALIGN_HALFWORD;
+#elif defined(STM32H7RS)
+  dmaInit.Request = i2s->DMA_PeriphRequest;
+  dmaInit.Direction = LL_DMA_DIRECTION_MEMORY_TO_PERIPH;
+  dmaInit.Priority = LL_DMA_HIGH_PRIORITY;
+  dmaInit.DestAddress = LL_SPI_DMA_GetTxRegAddr(i2s->SPIx);
+  dmaInit.DestDataWidth = LL_DMA_DEST_DATAWIDTH_HALFWORD;
+  dmaInit.SrcIncMode = LL_DMA_SRC_INCREMENT;
+  dmaInit.SrcDataWidth = LL_DMA_SRC_DATAWIDTH_HALFWORD;
+#endif
+  LL_DMA_Init(i2s->DMA, i2s->DMA_Stream, &dmaInit);
+}
+
+int stm32_i2s_init(const stm32_i2s_t* i2s)
+{
+  if (!i2s) return -1;
+  i2s_gpio_init(i2s);
+  
+  stm32_spi_enable_clock(i2s->SPIx);
+  LL_I2S_Disable(i2s->SPIx);
+
+  LL_I2S_InitTypeDef i2s_init;
+  LL_I2S_StructInit(&i2s_init);
+
+  i2s_init.Mode = LL_I2S_MODE_MASTER_TX;
+  i2s_init.Standard = LL_I2S_STANDARD_PHILIPS;
+  i2s_init.DataFormat = LL_I2S_DATAFORMAT_16B;
+  i2s_init.MCLKOutput = LL_I2S_MCLK_OUTPUT_ENABLE;
+  i2s_init.AudioFreq = LL_I2S_AUDIOFREQ_32K;
+
+  if (LL_I2S_Init(i2s->SPIx, &i2s_init) != SUCCESS) return -1;
+  LL_I2S_Enable(i2s->SPIx);
+
+  if (i2s->DMA) i2s_dma_init(i2s);
+
+  return 0;
+}
+
+void stm32_i2s_config_dma_stream(const stm32_i2s_t* i2s, void* buffer, uint32_t nb_xfer)
+{
+  LL_I2S_Disable(i2s->SPIx);
+
+  // clear HT & TC flags
+  stm32_dma_check_ht_flag(i2s->DMA, i2s->DMA_Stream);
+  stm32_dma_check_tc_flag(i2s->DMA, i2s->DMA_Stream);
+
+  // setup DMA buffer address & length
+#if defined(STM32H7)
+  LL_DMA_SetMemoryAddress(i2s->DMA, i2s->DMA_Stream, (uintptr_t)buffer);
+  LL_DMA_SetDataLength(i2s->DMA, i2s->DMA_Stream, nb_xfer);
+#elif defined(STM32H7RS)
+  LL_DMA_SetSrcAddress(i2s->DMA, i2s->DMA_Stream, (uintptr_t)buffer);
+  LL_DMA_SetBlkDataLength(i2s->DMA, i2s->DMA_Stream, nb_xfer * 2);  // bytes
+#endif
+}
+
+void stm32_i2s_start_dma_stream(const stm32_i2s_t* i2s)
+{
+#if defined(STM32H7)
+  LL_DMA_EnableStream(i2s->DMA, i2s->DMA_Stream);
+#elif defined(STM32H7RS)
+  LL_DMA_EnableChannel(i2s->DMA, i2s->DMA_Stream);
+#endif
+
+  // enable DMA request
+  LL_SPI_EnableDMAReq_TX(i2s->SPIx);
+
+  // enable I2S
+  LL_I2S_Enable(i2s->SPIx);
+
+  // start transfer
+  LL_SPI_StartMasterTransfer(i2s->SPIx);
+}
+
+bool stm32_i2s_is_xfer_started(const stm32_i2s_t* i2s)
+{
+  return READ_BIT(i2s->SPIx->CR1, SPI_CR1_CSTART);
+}
diff --git a/radio/src/targets/common/arm/stm32/stm32_i2s.h b/radio/src/targets/common/arm/stm32/stm32_i2s.h
new file mode 100644
index 000000000..3d1990014
--- /dev/null
+++ b/radio/src/targets/common/arm/stm32/stm32_i2s.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   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.
+ */
+
+#pragma once
+
+#include "stm32_gpio.h"
+
+struct stm32_i2s_pindef_t {
+  gpio_t pin;
+  gpio_af_t af;
+};
+
+struct stm32_i2s_t {
+  SPI_TypeDef*       SPIx;
+  stm32_i2s_pindef_t MCK;
+  stm32_i2s_pindef_t WS;
+  stm32_i2s_pindef_t CK;
+  stm32_i2s_pindef_t SDO;
+  stm32_i2s_pindef_t SDI;
+
+  DMA_TypeDef* DMA;
+  uint32_t     DMA_Stream;
+  uint32_t     DMA_PeriphRequest;
+};
+
+int stm32_i2s_init(const stm32_i2s_t* i2s);
+
+void stm32_i2s_config_dma_stream(const stm32_i2s_t* i2s, void* buffer, uint32_t nb_xfer);
+void stm32_i2s_start_dma_stream(const stm32_i2s_t* i2s);
+
+bool stm32_i2s_is_xfer_started(const stm32_i2s_t* i2s);
diff --git a/radio/src/targets/common/arm/stm32/stm32h7rsxx_hal_conf.h b/radio/src/targets/common/arm/stm32/stm32h7rsxx_hal_conf.h
index 272e6a97c..73c74c183 100644
--- a/radio/src/targets/common/arm/stm32/stm32h7rsxx_hal_conf.h
+++ b/radio/src/targets/common/arm/stm32/stm32h7rsxx_hal_conf.h
@@ -56,7 +56,7 @@ extern "C" {
 // #define HAL_HASH_MODULE_ENABLED
 // #define HAL_HCD_MODULE_ENABLED
 #define HAL_I2C_MODULE_ENABLED
-// #define HAL_I2S_MODULE_ENABLED
+#define HAL_I2S_MODULE_ENABLED
 // #define HAL_I3C_MODULE_ENABLED
 // #define HAL_ICACHE_MODULE_ENABLED
 // #define HAL_IRDA_MODULE_ENABLED
diff --git a/radio/src/targets/common/arm/stm32/stm32h7xx_hal_conf.h b/radio/src/targets/common/arm/stm32/stm32h7xx_hal_conf.h
index aa1f58a25..d26498031 100644
--- a/radio/src/targets/common/arm/stm32/stm32h7xx_hal_conf.h
+++ b/radio/src/targets/common/arm/stm32/stm32h7xx_hal_conf.h
@@ -63,7 +63,7 @@
 // #define HAL_HRTIM_MODULE_ENABLED
 // #define HAL_HSEM_MODULE_ENABLED
 #define HAL_I2C_MODULE_ENABLED
-// #define HAL_I2S_MODULE_ENABLED
+#define HAL_I2S_MODULE_ENABLED
 // #define HAL_IRDA_MODULE_ENABLED
 // #define HAL_IWDG_MODULE_ENABLED
 //#define HAL_JPEG_MODULE_ENABLED