I can't seem to get any jack clients to connect freebob-enabled-jackd, but I have managed to make a little progress. I built Hydrogen from source, and when it now tries to connect, I do see the attempt in qjackctl's Messages window. I get this: 00:39:40.097 MIDI connection graph change. unknown destination port in attempted connection [alsa_pcm:playback_1] In fact, I've seen this error when trying to connect other jack clients. My freebob port names: registered port freebob_pcm:dev1c_SpdifIn L, offset = 2048 registered port freebob_pcm:dev1c_SpdifIn R, offset = 4096 registered port freebob_pcm:dev1c_LineIn L, offset = 6144 registered port freebob_pcm:dev1c_LineIn R, offset = 8192 registered port freebob_pcm:dev1p_SpdifOut L, offset = 0 registered port freebob_pcm:dev1p_SpdifOut R, offset = 0 registered port freebob_pcm:dev1p_LineOut L, offset = 0 registered port freebob_pcm:dev1p_LineOut R, offset = 0 Is there a configuration file somewhere that is picking up alsa_pcm:placyback_1? Or is that just a default name that is expected to exist. It does not when I run jackd using the freebob driver.