diff --git a/reactos/include/dxsdk/dls1.h b/reactos/include/dxsdk/dls1.h
new file mode 100644
index 00000000000..fea53bbf76d
--- /dev/null
+++ b/reactos/include/dxsdk/dls1.h
@@ -0,0 +1,153 @@
+
+
+#ifndef _INC_DLS1
+#define _INC_DLS1
+
+#define CONN_SRC_NONE                   0x0000
+#define CONN_SRC_LFO                    0x0001
+#define CONN_SRC_KEYONVELOCITY          0x0002
+#define CONN_SRC_KEYNUMBER              0x0003
+#define CONN_SRC_EG1                    0x0004
+#define CONN_SRC_EG2                    0x0005
+#define CONN_SRC_PITCHWHEEL             0x0006
+#define CONN_SRC_CC1                    0x0081
+#define CONN_SRC_CC7                    0x0087
+#define CONN_SRC_CC10                   0x008a
+#define CONN_SRC_CC11                   0x008b
+#define CONN_DST_NONE                   0x0000
+#define CONN_DST_ATTENUATION            0x0001
+#define CONN_DST_PITCH                  0x0003
+#define CONN_DST_PAN                    0x0004
+#define CONN_DST_LFO_FREQUENCY          0x0104
+#define CONN_DST_LFO_STARTDELAY         0x0105
+#define CONN_DST_EG1_ATTACKTIME         0x0206
+#define CONN_DST_EG1_DECAYTIME          0x0207
+#define CONN_DST_EG1_RELEASETIME        0x0209
+#define CONN_DST_EG1_SUSTAINLEVEL       0x020a
+#define CONN_DST_EG2_ATTACKTIME         0x030a
+#define CONN_DST_EG2_DECAYTIME          0x030b
+#define CONN_DST_EG2_RELEASETIME        0x030d
+#define CONN_DST_EG2_SUSTAINLEVEL       0x030e
+#define CONN_TRN_NONE                   0x0000
+#define CONN_TRN_CONCAVE                0x0001
+#define FOURCC_DLS                      mmioFOURCC('D','L','S',' ')
+#define FOURCC_DLID                     mmioFOURCC('d','l','i','d')
+#define FOURCC_COLH                     mmioFOURCC('c','o','l','h')
+#define FOURCC_WVPL                     mmioFOURCC('w','v','p','l')
+#define FOURCC_PTBL                     mmioFOURCC('p','t','b','l')
+#define FOURCC_PATH                     mmioFOURCC('p','a','t','h')
+#define FOURCC_wave                     mmioFOURCC('w','a','v','e')
+#define FOURCC_LINS                     mmioFOURCC('l','i','n','s')
+#define FOURCC_INS                      mmioFOURCC('i','n','s',' ')
+#define FOURCC_INSH                     mmioFOURCC('i','n','s','h')
+#define FOURCC_LRGN                     mmioFOURCC('l','r','g','n')
+#define FOURCC_RGN                      mmioFOURCC('r','g','n',' ')
+#define FOURCC_RGNH                     mmioFOURCC('r','g','n','h')
+#define FOURCC_LART                     mmioFOURCC('l','a','r','t')
+#define FOURCC_ART1                     mmioFOURCC('a','r','t','1')
+#define FOURCC_WLNK                     mmioFOURCC('w','l','n','k')
+#define FOURCC_WSMP                     mmioFOURCC('w','s','m','p')
+#define FOURCC_VERS                     mmioFOURCC('v','e','r','s')
+#define F_INSTRUMENT_DRUMS              0x80000000
+#define F_RGN_OPTION_SELFNONEXCLUSIVE   0x0001
+#define WAVELINK_CHANNEL_LEFT           0x0001
+#define WAVELINK_CHANNEL_RIGHT          0x0002
+#define F_WAVELINK_PHASE_MASTER         0x0001
+#define POOL_CUE_NULL                   0xffffffff
+#define F_WSMP_NO_TRUNCATION            0x0001l
+#define F_WSMP_NO_COMPRESSION           0x0002l
+#define WLOOP_TYPE_FORWARD              0
+
+typedef struct _CONNECTION
+{
+  USHORT usSource;
+  USHORT usControl;
+  USHORT usDestination;
+  USHORT usTransform;
+  LONG lScale;
+}CONNECTION, *LPCONNECTION;
+
+typedef struct _CONNECTIONLIST
+{
+  ULONG cbSize;
+  ULONG cConnections;
+} CONNECTIONLIST, *LPCONNECTIONLIST;
+
+typedef struct _DLSVERSION
+{
+  DWORD dwVersionMS;
+  DWORD dwVersionLS;
+} DLSVERSION, *LPDLSVERSION;
+
+typedef struct _DLSHEADER
+{
+  ULONG cInstruments;
+}DLSHEADER, *LPDLSHEADER;
+
+typedef struct _DLSID
+{
+  ULONG ulData1;
+  USHORT usData2;
+  USHORT usData3;
+  BYTE abData4[8];
+} DLSID, FAR *LPDLSID;
+
+typedef struct _INSTHEADER
+{
+  ULONG cRegions;
+  MIDILOCALE Locale;
+}INSTHEADER, *LPINSTHEADER;
+
+typedef struct _POOLCUE
+{
+  ULONG    ulOffset;
+}POOLCUE, *LPPOOLCUE;
+
+typedef struct _POOLTABLE
+{
+  ULONG    cbSize;
+  ULONG    cCues;
+} POOLTABLE, FAR *LPPOOLTABLE;
+
+typedef struct _RGNRANGE
+{
+  USHORT usLow;
+  USHORT usHigh;
+} RGNRANGE, *LPRGNRANGE;
+
+typedef struct _RGNHEADER
+{
+  RGNRANGE RangeKey;
+  RGNRANGE RangeVelocity;
+  USHORT fusOptions;
+  USHORT usKeyGroup;
+}RGNHEADER, *LPRGNHEADER;
+
+typedef struct _rloop
+{
+  ULONG cbSize;
+  ULONG ulType;
+  ULONG ulStart;
+  ULONG ulLength;
+} WLOOP, *LPWLOOP;
+
+typedef struct _rwsmp
+{
+  ULONG cbSize;
+  USHORT usUnityNote;
+  SHORT sFineTune;
+  LONG lAttenuation;
+  ULONG fulOptions;
+  ULONG cSampleLoops;
+} WSMPL, *LPWSMPL;
+
+typedef struct _WAVELINK
+{
+  USHORT fusOptions;
+  USHORT usPhaseGroup;
+  ULONG ulChannel;
+  ULONG ulTableIndex;
+}WAVELINK, *LPWAVELINK;
+
+
+#endif