DirectSound: Increase the size of the default buffer size.

Public issue https://github.com/mackron/miniaudio/issues/429

miniaudio.h

@@ -23173,8 +23173,11 @@ static ma_result ma_config_to_WAVEFORMATEXTENSIBLE(ma_format format, ma_uint32 c
 
 static ma_uint32 ma_calculate_period_size_in_frames_from_descriptor__dsound(const ma_device_descriptor* pDescriptor, ma_uint32 nativeSampleRate, ma_performance_profile performanceProfile)
 {
-    /* DirectSound has a minimum period size of 20ms. */
-    ma_uint32 minPeriodSizeInFrames = ma_calculate_buffer_size_in_frames_from_milliseconds(20, nativeSampleRate);
+    /*
+    DirectSound has a minimum period size of 20ms. In practice, this doesn't seem to be enough for
+    reliable glitch-free processing so going to use 30ms instead.
+    */
+    ma_uint32 minPeriodSizeInFrames = ma_calculate_buffer_size_in_frames_from_milliseconds(30, nativeSampleRate);
     ma_uint32 periodSizeInFrames;
 
     periodSizeInFrames = ma_calculate_buffer_size_in_frames_from_descriptor(pDescriptor, nativeSampleRate, performanceProfile);