and i found this http://www.linuxsynths.com ok just kidding, what i found was this but it needs LV2 support http://openavproductions.com/fabla2/ i dont know if this can be helpful
Make sure to search to see if your idea has been posted before! Check our issue tracker as well, just to make sure you are not posting a duplicate: https://github.com/LMMS/lmms/issues