diff --git a/reactos/include/psdk/ksmedia.h b/reactos/include/psdk/ksmedia.h
index 4873e1dbe64..1cde28039e2 100644
--- a/reactos/include/psdk/ksmedia.h
+++ b/reactos/include/psdk/ksmedia.h
@@ -348,6 +348,25 @@ typedef struct {
     WAVEFORMATEX    WaveFormatEx;
 } KSDATAFORMAT_WAVEFORMATEX, *PKSDATAFORMAT_WAVEFORMATEX;
 
+#ifndef _WAVEFORMATEXTENSIBLE_
+#define _WAVEFORMATEXTENSIBLE_
+typedef struct {
+    WAVEFORMATEX    Format;
+    union
+    {
+        WORD wValidBitsPerSample;
+        WORD wSamplesPerBlock;
+        WORD wReserved;
+    }Samples;
+    DWORD dwChannelMask;
+    GUID SubFormat;
+} WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
+#endif
+
+#if !defined(WAVE_FORMAT_EXTENSIBLE)
+#define  WAVE_FORMAT_EXTENSIBLE                 0xFFFE
+#endif 
+
 typedef struct {
     ULONG               Flags;
     ULONG               Control;
@@ -734,4 +753,45 @@ typedef struct
    ULONG                    ChannelMask;
 } KSDATARANGE_MUSIC, *PKSDATARANGE_MUSIC;
 
+#define SPEAKER_FRONT_LEFT              0x1
+#define SPEAKER_FRONT_RIGHT             0x2
+#define SPEAKER_FRONT_CENTER            0x4
+#define SPEAKER_LOW_FREQUENCY           0x8
+#define SPEAKER_BACK_LEFT               0x10
+#define SPEAKER_BACK_RIGHT              0x20
+#define SPEAKER_FRONT_LEFT_OF_CENTER    0x40
+#define SPEAKER_FRONT_RIGHT_OF_CENTER   0x80
+#define SPEAKER_BACK_CENTER             0x100
+#define SPEAKER_SIDE_LEFT               0x200
+#define SPEAKER_SIDE_RIGHT              0x400
+#define SPEAKER_TOP_CENTER              0x800
+#define SPEAKER_TOP_FRONT_LEFT          0x1000
+#define SPEAKER_TOP_FRONT_CENTER        0x2000
+#define SPEAKER_TOP_FRONT_RIGHT         0x4000
+#define SPEAKER_TOP_BACK_LEFT           0x8000
+#define SPEAKER_TOP_BACK_CENTER         0x10000
+#define SPEAKER_TOP_BACK_RIGHT          0x20000
+
+#define SPEAKER_RESERVED                0x7FFC0000
+#define SPEAKER_ALL                     0x80000000
+
+
+#if (NTDDI_VERSION >= NTDDI_WINXP)
+#define KSAUDIO_SPEAKER_DIRECTOUT       0
+#endif
+
+#define KSAUDIO_SPEAKER_MONO            (SPEAKER_FRONT_CENTER)
+#define KSAUDIO_SPEAKER_STEREO          (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT)
+#define KSAUDIO_SPEAKER_QUAD            (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
+                                         SPEAKER_BACK_LEFT  | SPEAKER_BACK_RIGHT)
+#define KSAUDIO_SPEAKER_SURROUND        (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
+                                         SPEAKER_FRONT_CENTER | SPEAKER_BACK_CENTER)
+#define KSAUDIO_SPEAKER_5POINT1         (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
+                                         SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | \
+                                         SPEAKER_BACK_LEFT  | SPEAKER_BACK_RIGHT)
+#define KSAUDIO_SPEAKER_7POINT1         (SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | \
+                                         SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | \
+                                         SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | \
+                                         SPEAKER_FRONT_LEFT_OF_CENTER | SPEAKER_FRONT_RIGHT_OF_CENTER)
+
 #endif