diff -ur portaudio.orig/src/hostapi/dsound/pa_win_ds.c portaudio/src/hostapi/dsound/pa_win_ds.c
--- portaudio.orig/src/hostapi/dsound/pa_win_ds.c	2016-12-30 08:41:50.075512531 -0500
+++ portaudio/src/hostapi/dsound/pa_win_ds.c	2016-12-30 08:46:26.248068904 -0500
@@ -904,6 +904,9 @@
                             case DSSPEAKER_STEREO:           count = 2; break;
                             case DSSPEAKER_SURROUND:         count = 4; break;
                             case DSSPEAKER_5POINT1:          count = 6; break;
+#ifndef DSSPEAKER_7POINT1
+#define DSSPEAKER_7POINT1 0x00000007
+#endif
                             case DSSPEAKER_7POINT1:          count = 8; break;
 #ifndef DSSPEAKER_7POINT1_SURROUND
 #define DSSPEAKER_7POINT1_SURROUND 0x00000008
@@ -2136,7 +2139,8 @@
         }
         else
         {
-            CalculateBufferSettings( &stream->hostBufferSizeFrames, &pollingPeriodFrames,
+            CalculateBufferSettings( (unsigned long *)&stream->hostBufferSizeFrames, 
+	            &pollingPeriodFrames,
                     /* isFullDuplex = */ (inputParameters && outputParameters),
                     suggestedInputLatencyFrames,
                     suggestedOutputLatencyFrames,