diff --git a/include/sapi.idl b/include/sapi.idl
index 59c2540ba21..d2c1aac8afc 100644
--- a/include/sapi.idl
+++ b/include/sapi.idl
@@ -351,6 +351,81 @@ typedef [hidden] enum SPVALUETYPE
     SPDF_ALL           = 0x000000ff
 } SPVALUETYPE;
 
+typedef [hidden] enum SPSTREAMFORMAT
+{
+    SPSF_Default = -1,
+    SPSF_NoAssignedFormat = 0,
+    SPSF_Text,
+    SPSF_NonStandardFormat,
+    SPSF_ExtendedAudioFormat,
+    SPSF_8kHz8BitMono,
+    SPSF_8kHz8BitStereo,
+    SPSF_8kHz16BitMono,
+    SPSF_8kHz16BitStereo,
+    SPSF_11kHz8BitMono,
+    SPSF_11kHz8BitStereo,
+    SPSF_11kHz16BitMono,
+    SPSF_11kHz16BitStereo,
+    SPSF_12kHz8BitMono,
+    SPSF_12kHz8BitStereo,
+    SPSF_12kHz16BitMono,
+    SPSF_12kHz16BitStereo,
+    SPSF_16kHz8BitMono,
+    SPSF_16kHz8BitStereo,
+    SPSF_16kHz16BitMono,
+    SPSF_16kHz16BitStereo,
+    SPSF_22kHz8BitMono,
+    SPSF_22kHz8BitStereo,
+    SPSF_22kHz16BitMono,
+    SPSF_22kHz16BitStereo,
+    SPSF_24kHz8BitMono,
+    SPSF_24kHz8BitStereo,
+    SPSF_24kHz16BitMono,
+    SPSF_24kHz16BitStereo,
+    SPSF_32kHz8BitMono,
+    SPSF_32kHz8BitStereo,
+    SPSF_32kHz16BitMono,
+    SPSF_32kHz16BitStereo,
+    SPSF_44kHz8BitMono,
+    SPSF_44kHz8BitStereo,
+    SPSF_44kHz16BitMono,
+    SPSF_44kHz16BitStereo,
+    SPSF_48kHz8BitMono,
+    SPSF_48kHz8BitStereo,
+    SPSF_48kHz16BitMono,
+    SPSF_48kHz16BitStereo,
+    SPSF_TrueSpeech_8kHz1BitMono,
+    SPSF_CCITT_ALaw_8kHzMono,
+    SPSF_CCITT_ALaw_8kHzStereo,
+    SPSF_CCITT_ALaw_11kHzMono,
+    SPSF_CCITT_ALaw_11kHzStereo,
+    SPSF_CCITT_ALaw_22kHzMono,
+    SPSF_CCITT_ALaw_22kHzStereo,
+    SPSF_CCITT_ALaw_44kHzMono,
+    SPSF_CCITT_ALaw_44kHzStereo,
+    SPSF_CCITT_uLaw_8kHzMono,
+    SPSF_CCITT_uLaw_8kHzStereo,
+    SPSF_CCITT_uLaw_11kHzMono,
+    SPSF_CCITT_uLaw_11kHzStereo,
+    SPSF_CCITT_uLaw_22kHzMono,
+    SPSF_CCITT_uLaw_22kHzStereo,
+    SPSF_CCITT_uLaw_44kHzMono,
+    SPSF_CCITT_uLaw_44kHzStereo,
+    SPSF_ADPCM_8kHzMono,
+    SPSF_ADPCM_8kHzStereo,
+    SPSF_ADPCM_11kHzMono,
+    SPSF_ADPCM_11kHzStereo,
+    SPSF_ADPCM_22kHzMono,
+    SPSF_ADPCM_22kHzStereo,
+    SPSF_ADPCM_44kHzMono,
+    SPSF_ADPCM_44kHzStereo,
+    SPSF_GSM610_8kHzMono,
+    SPSF_GSM610_11kHzMono,
+    SPSF_GSM610_22kHzMono,
+    SPSF_GSM610_44kHzMono,
+    SPSF_NUM_FORMATS
+} SPSTREAMFORMAT;
+
 typedef unsigned short SPPHONEID;
 
 typedef [restricted, hidden] struct SPPHRASEELEMENT