It could be this bug: http://code.google.com/p/amsynth/issues/detail?id=40
If this is the case it's fixed in Ubuntu release raring and later or you can get the latest (1.4.0) from nickdowell's ppa https://launchpad.net/~nick-nickdowell/+archive/amsynth-master-daily ** Bug watch added: code.google.com/p/amsynth/issues #40 http://code.google.com/p/amsynth/issues/detail?id=40 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1100016 Title: amsynth segfault if Jack midi is used To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/amsynth/+bug/1100016/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs