                 ]
             ]
         ]
-        */
         
         // Version 1.0 of MovingImages will not manipulate audio tracks.
         // So adding audio tracks has been dropped for now.
-        // let result2 = MIMovingImagesHandleCommands(nil, commandsDict2, nil)
-        // let errorCode2 = MIGetErrorCodeFromReplyDictionary(result2)
-        // XCTAssertEqual(errorCode2.rawValue, 0,
-        //    "Error adding an audio track to a movie editor.")
+        let result2 = MIMovingImagesHandleCommands(nil, commandsDict2, nil, nil)
+        let errorCode2 = MIGetErrorCodeFromReplyDictionary(result2)
+        XCTAssertEqual(errorCode2.rawValue, 0,
+            "Error adding an audio track to a movie editor.")
         
         // Now add a video track with the persistent track id returned above.
         // This should produce an error as the track id is already used.

            "\"mediatype\":\"vide\",\"timerange\":{\"start\":{\"flags\":0," +
            "\"value\":0,\"timescale\":0,\"epoch\":0},\"duration\":{\"flags\"" +
            ":0,\"value\":0,\"timescale\":0,\"epoch\":0}},\"trackid\":" +
            "1,\"languagecode\":\"\",\"languagetag\":\"\",\"affinetransform\"" +
            ":{\"m12\":0,\"m21\":0,\"m22\":1,\"tY\":0,\"m11\":1,\"tX\":" +
            "0},\"requiresframereordering\":false,\"trackenabled\":true," +
            "\"framerate\":0}",
            "Get video track properties as json returned diff")
        
        /*
        let audioTrackID = [
            MIJSONPropertyMovieMediaType : MIJSONValueMovieMediaTypeAudio,
            MIJSONPropertyMovieTrackIndex : 0

        
        let propertiesJSON = MIGetStringFromReplyDictionary(result4)
        XCTAssertEqual(propertiesJSON,
            "{\"objecttype\":\"movieeditor\",\"objectname\":\"test003.movieeditor\",\"numberoftracks\":2,\"objectreference\":0,\"metadataformats\":\"\",\"duration\":{\"flags\":1,\"value\":0,\"timescale\":1,\"epoch\":0}}",
            "Get movie editor properties as json returned diff")
        
        let commandsDict5 = [
