Index: /trunk/src/VBox/Devices/Audio/DevHDA.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DevHDA.cpp	(revision 65151)
+++ /trunk/src/VBox/Devices/Audio/DevHDA.cpp	(revision 65152)
@@ -4444,5 +4444,5 @@
             if (hdaGetDirFromSD(pStream->u8SD) == PDMAUDIODIR_OUT) /* Output (SDO). */
             {
-                cbToProcess = RTCircBufUsed(pCircBuf);
+                cbToProcess = (uint32_t)RTCircBufUsed(pCircBuf);
                 if (cbToProcess)
                     rc2 = hdaStreamRead(pThis, pStream, cbToProcess, &cbProcessed);
@@ -4450,5 +4450,5 @@
             else /* Input (SDI). */
             {
-                cbToProcess = RTCircBufFree(pCircBuf);
+                cbToProcess = (uint32_t)RTCircBufFree(pCircBuf);
                 if (cbToProcess)
                     rc2 = hdaStreamWrite(pThis, pStream, cbToProcess, &cbProcessed);