Hi, zynaddsubfx works fine with jackd. But I have problems to connect iiwusynth (0.2.2) to jackd (0.51) Maybe the options are not correct. I start jackd with: jackd -R -d alsa -d hw:0 -r 44100 -D and iiwusynth with: iiwusynth -m alsa_seq -a jack -z 1024 -c 2 -r 44100 VintageDreamsWaves.sf2' *** libjack: WARNING! Use of function jack_set_buffer_size_callback() is deprecated! *** the sample rate is now 44100/sec iiwusynth: error: Cannot activate the iiwusynth as a JACK client Failed to create the synthesizer Other applications like muse and alsaplayer works fine. But I always get the massage *** libjack: WARNING! Use of function jack_set_buffer_size_callback() is deprecated! *** any ideas? thanks chris