F11: alsa sequencer error

[Kevin Kofler]

If your sound hardware does not support MIDI, you need to run a software
sequencer, e.g. timidity++.

For JACK output, use this:
timidity -iADq -Oj --sequencer-ports=1

This one will use PulseAudio (through libao) for output instead:
timidity -iADq -OO --sequencer-ports=1

        Kevin Kofler