With the help of a java programmer, we have created an application to play multiple local ogg sound files, all triggered from a single 'play' event. The event triggers an instance of the ogg.vorbis player for each file to be played. However we are finding that these 'tracks' are not synchronised, since the audioinputstream for each is passed to the dataline, and so gets handled by the OS. We are now looking for a way to combine these inputstreams, into a single input stream, (mixed), so that the combined stream can be output to the dataline, and so guarantee, that the combined or mixed sound is indeed synchronised. Since we have some controls within each of the players, pan, level, mute, we should be able to still use these for each of the channels before they are combined. There may indeed be a solution already to this problem, and pointers in the right direction would be a help. Otherwise a suggested approach would we most welcome. Thanks in advance Gerry Abbott