diff --git a/Makefile b/Makefile
index 94220c3..dc64347 100644
--- a/Makefile
+++ b/Makefile
@@ -137,6 +137,7 @@ SRC = main.c \
 	$(USBD_COMPOSITE)/App/usbd_cdc_acm_if.c \
 	$(USBD_COMPOSITE)/App/usbd_desc.c \
 	$(USBD_COMPOSITE)/App/usbd_msc_if.c \
+	$(USBD_COMPOSITE)/App/usbd_midi_if.c \
 	$(wildcard $(USBD_COMPOSITE)/Class/CDC_ACM/Src/*.c) \
 	$(wildcard $(USBD_COMPOSITE)/Class/COMPOSITE/Src/*.c) \
 	$(wildcard $(USBD_COMPOSITE)/Class/MSC/Src/*.c) \
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.c b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.c
index 4fbad93..78ad3f9 100644
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.c
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.c
@@ -34,7 +34,7 @@ static int8_t MIDI_Control(uint8_t cmd, uint8_t *pbuf, uint16_t length){
 static int8_t MIDI_Receive(uint8_t *pbuf, uint32_t *Len){
   Caw_printf("midi receive\n\r");
 
-  uint32_t len = *Len;
+  // uint32_t len = *Len;
   // handle len worth of bytes in pbuf
   // just print to Caw for now
 
@@ -50,22 +50,22 @@ static int8_t MIDI_TransmitCplt(uint8_t *Buf, uint32_t *Len, uint8_t epnum){
 
 
 
-uint8_t USBD_MIDI_GetDeviceState(USBD_HandleTypeDef  *pdev){
-  return pdev->dev_state;
+uint8_t USBD_MIDI_GetDeviceState(void){
+  return hUsbDevice.dev_state;
 }
 
-uint8_t USBD_MIDI_GetState(USBD_HandleTypeDef  *pdev){
-  USBD_MIDI_HandleTypeDef *hmidi = (USBD_MIDI_HandleTypeDef*)pdev->pClassData_MIDI;
+uint8_t USBD_MIDI_GetState(void){
+  USBD_MIDI_HandleTypeDef *hmidi = hUsbDevice.pClassData_MIDI;
   return hmidi->state;
 }
 
-uint8_t USBD_MIDI_SendReport(USBD_HandleTypeDef  *pdev, uint8_t *report, uint16_t len){
-  USBD_MIDI_HandleTypeDef *hmidi = (USBD_MIDI_HandleTypeDef*)pdev->pClassData_MIDI;
+uint8_t USBD_MIDI_SendReport(uint8_t *report, uint16_t len){
+  USBD_MIDI_HandleTypeDef *hmidi = hUsbDevice.pClassData_MIDI;
 
-  if (pdev->dev_state == USBD_STATE_CONFIGURED){
+  if (hUsbDevice.dev_state == USBD_STATE_CONFIGURED){
     if(hmidi->state == MIDI_IDLE){
       hmidi->state = MIDI_BUSY;
-      USBD_LL_Transmit (pdev, MIDI_EPIN_ADDR, report, len);
+      USBD_LL_Transmit (&hUsbDevice, MIDI_IN_EP, report, len);
     }
   }
   return USBD_OK;
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.h b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.h
index e67ede1..93eaa8e 100644
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.h
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/usbd_midi_if.h
@@ -4,6 +4,6 @@
 
 extern USBD_MIDI_ItfTypeDef USBD_MIDI_fops;
 
-uint8_t USBD_MIDI_GetDeviceState(USBD_HandleTypeDef  *pdev);
-uint8_t USBD_MIDI_GetState(USBD_HandleTypeDef  *pdev);
-uint8_t USBD_MIDI_SendReport (USBD_HandleTypeDef *pdev, uint8_t *report, uint16_t len);
+uint8_t USBD_MIDI_GetDeviceState(void);
+uint8_t USBD_MIDI_GetState(void);
+uint8_t USBD_MIDI_SendReport(uint8_t *report, uint16_t len);
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/COMPOSITE/Src/usbd_composite.c b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/COMPOSITE/Src/usbd_composite.c
index 8f908ab..f0792c7 100755
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/COMPOSITE/Src/usbd_composite.c
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/COMPOSITE/Src/usbd_composite.c
@@ -471,7 +471,7 @@ static uint8_t USBD_COMPOSITE_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum)
   }
 #endif
 #if (USBD_USE_MIDI == 1)
-  if (epnum == (MIDI_EPIN_ADDR & 0x7F))
+  if (epnum == (MIDI_IN_EP & 0x7F))
   {
     USBD_MIDI.DataIn(pdev, epnum);
   }
@@ -762,7 +762,7 @@ static uint8_t USBD_COMPOSITE_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum)
   }
 #endif
 #if (USBD_USE_MIDI == 1)
-  if (epnum == MIDI_EPOUT_ADDR)
+  if (epnum == MIDI_OUT_EP)
   {
     USBD_MIDI.DataOut(pdev, epnum);
   }
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Inc/usbd_midi.h b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Inc/usbd_midi.h
index a954bb0..4a24bc5 100644
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Inc/usbd_midi.h
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Inc/usbd_midi.h
@@ -8,10 +8,10 @@
 #define MIDI_IN_PORTS_NUM              0x01
 #define MIDI_OUT_PORTS_NUM             0x01
 
-#define MIDI_EPIN_ADDR                 0x81
+// #define MIDI_EPIN_ADDR                 0x81
 #define MIDI_EPIN_SIZE                 0x40
 
-#define MIDI_EPOUT_ADDR                0x01
+// #define MIDI_EPOUT_ADDR                0x01
 #define MIDI_EPOUT_SIZE                0x40
 
 #define USB_MIDI_CLASS_DESC_SHIFT      18
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Src/usbd_midi.c b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Src/usbd_midi.c
index 770e187..be5a2d7 100644
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Src/usbd_midi.c
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Class/MIDI/Src/usbd_midi.c
@@ -525,19 +525,19 @@ static uint8_t USBD_MIDI_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx){
   pdev->pClassData_MIDI = (void*)hmidi;
 
   USBD_LL_OpenEP(pdev,
-                 MIDI_EPIN_ADDR,
+                 MIDI_IN_EP,
                  USBD_EP_TYPE_INTR,
                  MIDI_EPIN_SIZE);
-  pdev->ep_out[MIDI_EPIN_ADDR & 0xFU].is_used = 1U;
+  pdev->ep_out[MIDI_IN_EP & 0xFU].is_used = 1U;
 
   USBD_LL_OpenEP(pdev,
-               MIDI_EPOUT_ADDR,
+               MIDI_OUT_EP,
                USBD_EP_TYPE_INTR,
                MIDI_EPOUT_SIZE);
-  pdev->ep_in[MIDI_EPOUT_ADDR & 0xFU].is_used = 1U;
+  pdev->ep_in[MIDI_OUT_EP & 0xFU].is_used = 1U;
 
   USBD_LL_PrepareReceive(pdev, 
-               MIDI_EPOUT_ADDR,                                      
+               MIDI_OUT_EP,                                      
                hmidi->RxBuffer,
                MIDI_EPOUT_SIZE);    
   return ret;
@@ -546,11 +546,11 @@ static uint8_t USBD_MIDI_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx){
 static uint8_t  USBD_MIDI_DeInit (USBD_HandleTypeDef *pdev, uint8_t cfgidx){
   /* Close MIDI EPs */
   // USBD_LL_CloseEP(pdev, MIDI_EPIN_SIZE);
-  USBD_LL_CloseEP(pdev, MIDI_EPIN_ADDR);
-  pdev->ep_in[MIDI_EPIN_ADDR & 0xFU].is_used = 0U;
+  USBD_LL_CloseEP(pdev, MIDI_IN_EP);
+  pdev->ep_in[MIDI_IN_EP & 0xFU].is_used = 0U;
 
-  USBD_LL_CloseEP(pdev, MIDI_EPOUT_ADDR);
-  pdev->ep_in[MIDI_EPOUT_ADDR & 0xFU].is_used = 0U;
+  USBD_LL_CloseEP(pdev, MIDI_OUT_EP);
+  pdev->ep_in[MIDI_OUT_EP & 0xFU].is_used = 0U;
 
   /* FRee allocated memory */
   if(pdev->pClassData_MIDI != NULL){
@@ -630,7 +630,7 @@ static uint8_t  USBD_MIDI_DataIn (USBD_HandleTypeDef *pdev, uint8_t epnum){
 }
 
 static uint8_t  USBD_MIDI_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum){
-  if (epnum != (MIDI_EPOUT_ADDR & 0x0F)) return USBD_FAIL;
+  if (epnum != (MIDI_OUT_EP & 0x0F)) return USBD_FAIL;
 
   USBD_MIDI_HandleTypeDef *hmidi = (USBD_MIDI_HandleTypeDef*)pdev->pClassData_MIDI;
   hmidi->RxLength = USBD_LL_GetRxDataSize(pdev, epnum);
@@ -638,7 +638,7 @@ static uint8_t  USBD_MIDI_DataOut (USBD_HandleTypeDef *pdev, uint8_t epnum){
   ((USBD_MIDI_ItfTypeDef*)pdev->pUserData_MIDI)->Receive(hmidi->RxBuffer, &hmidi->RxLength);
 
   USBD_LL_PrepareReceive(pdev, 
-               MIDI_EPOUT_ADDR,                                      
+               MIDI_OUT_EP,                                      
                hmidi->RxBuffer,
                MIDI_EPOUT_SIZE);    
   
diff --git a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Target/usbd_conf.c b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Target/usbd_conf.c
index 35b6421..322a31b 100755
--- a/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Target/usbd_conf.c
+++ b/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/Target/usbd_conf.c
@@ -489,7 +489,7 @@ USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev)
     HAL_PCDEx_SetTxFiFoInBytes(hpcd_USB_OTG_PTR, (PRNT_IN_EP & 0x7F), 128);
 #endif
 #if (USBD_USE_MIDI == 1)
-    HAL_PCDEx_SetTxFiFoInBytes(hpcd_USB_OTG_PTR, (MIDI_EPIN_ADDR & 0x7F), 128);
+    HAL_PCDEx_SetTxFiFoInBytes(hpcd_USB_OTG_PTR, (MIDI_IN_EP & 0x7F), 128);
 #endif
 #if (USBD_USE_CDC_ACM == 1)
     for (uint8_t i = 0; i < USBD_CDC_ACM_COUNT; i++)
diff --git a/crow.dfu b/crow.dfu
index 711d373..c6252df 100644
Binary files a/crow.dfu and b/crow.dfu differ
diff --git a/main.c b/main.c
index c634406..c467163 100755
--- a/main.c
+++ b/main.c
@@ -25,6 +25,7 @@
 // new USB composite device setup
 #include "lib/usb_otg.h"
 #include "usb_device.h"
+#include "usbd_midi_if.h"
 
 #include "lib/midi.h"
 // #include "lib/mhost.h"
@@ -130,6 +131,27 @@ int main(void)
             char* crow_msg = "print('hi')\n\r";
             USBHost_Send((unsigned char*)crow_msg, strlen(crow_msg));
             // Caw_printf("hi\n\r");
+
+            // the midiparser lib probably wraps this
+            // 144 60 127 - turn ON note #60 on MIDI channel 1 with a velocity of 127
+            uint8_t cable = 0;
+            uint8_t code = 0x9; // note-on message (see usb-midi pdf doc)
+            uint8_t message = 0x9; // note-on
+            uint8_t channel = 0;
+            uint8_t note = 60;
+            uint8_t velocity = 127;
+
+            uint8_t reportBuffer[4] = {
+              // cable - represents physical/virtual port number (0 - 15) of the device
+              // code - in general cases is equal to midi message
+              (cable << 4) | code,
+              (message << 4) | channel,
+              note,
+              velocity,
+            };
+            // while (USBD_MIDI_GetState() != MIDI_IDLE) {};
+            USBD_MIDI_SendReport(reportBuffer, 4);
+            Caw_printf(".\n\r");
         }
 
         U_PrintNow();