Hi, trying lash-0.5.3 here, weired things happened: I set up a simple project with only 1 lash_synth, the lash_synth was connected to an alsa-sequencer keyboard port and to jack. After saving, closing and restarting that lash-project, the alsa-sequencer connection wasn't restored, until I launched an innocent "aconnect -il" in an other terminal. Funny, no? Reason is I think, that after polling for alsa-seq events, always only 1 event was red via snd_seq_event_input(). Attached patch cures & simplifies things by avoiding the poll() call and using pthread_cancel() to stop the thread. Karsten