The output from jackd on the slave shows that there are only two channels, and only in one direction: Send channels (audio - midi) : 0 - 0 Return channels (audio - midi) : 2 - 0 $ jackd -d net --help ... -C, --input-ports Number of audio input ports. If -1, audio physical input from the master (default: -1) -P, --output-ports Number of audio output ports. If -1, audio physical output from the master (default: -1) -i, --midi-in-ports Number of MIDI input ports. If -1, MIDI physical input from the master (default: -1) -o, --midi-out-ports Number of MIDI output ports. If -1, MIDI physical output from the master (default: -1) Try setting the -C and -P values. -- Chris Caudle _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user