CoreAudio macOS xcode9 beta3

#CoreAudio.framework

diff -ruN /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/CoreAudioTypes.h /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/CoreAudioTypes.h
--- /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/CoreAudioTypes.h	2017-06-10 18:35:31.000000000 -0400
+++ /Applications/Xcode9-beta3.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/CoreAudio.framework/Headers/CoreAudioTypes.h	2017-06-28 03:53:15.000000000 -0400
@@ -378,6 +378,8 @@
                         Enhanced AC-3, has no flags.
     @constant       kAudioFormatFLAC
                         Free Lossless Audio Codec, the flags indicate the bit depth of the source material.
+    @constant       kAudioFormatOpus
+                        Opus codec, has no flags.
 */
 CF_ENUM(AudioFormatID)
 {
@@ -418,7 +420,8 @@
     kAudioFormatMicrosoftGSM            = 0x6D730031,
     kAudioFormatAES3                    = 'aes3',
     kAudioFormatEnhancedAC3             = 'ec-3',
-    kAudioFormatFLAC                    = 'flac'
+    kAudioFormatFLAC                    = 'flac',
+    kAudioFormatOpus                    = 'opus'
 };
 
 /*!