On 08/20/2010 07:25 AM, Christoph Kuhr wrote: Hi Christoph, What are you trying to accomplish? Do you need sample accurate sync, or does a synchronous start suffice? To sync-start, the pragmatic simple way is to just send an OSC message to all applications involved. ..or you can have a look at hdsync/ivysync on dyne.org. For accurate sync: Netjack (comes with JACK) allows to sync multiple machines (via ethernet) using JACK-transport. AFAIK VLC can only be started/stopped via remote-ctrl but does not provide for external sync. You could use xjadeo.sf.net for that. There's also a pd-external (externals/tb/jack_transport) that allows to sync pd and ardour: http://lists.puredata.info/pipermail/pd-dev/2007-08/009275.html HTH, robin