hot linking channels caused engine to crash, in some prior versions. Me can say at least it doesn't crash. but can't exactly say if it's operable since having only one soundcard connected. It is operable.
And for sure, no sound server connected ...
Further Advanced Gtk+ Sequencer is shipped with a sample file ags_file.xml and configuration ags.conf
So you might:
$ ./ags --filename ags_file.xml