[linux-audio-user] Re: [linux-audio-dev] dssi question
cannam at all-day-breakfast.com
Sun Dec 5 09:25:59 EST 2004
On Sunday 05 Dec 2004 11:37, Julien Claassen wrote:
> I've just one important - for me at least - question. Can the jack
> example client be used without gui? Can it be used with midi only?
Yes and no. The DSSI JACK host will always try to start a user interface for
each plugin it loads. (It could easily have a command line switch to tell it
not to, but there isn't one at the moment.) However, if no user interface
executable is found, it will continue happily without. So you could make it
never start a UI by simply not installing any UIs. It will still continue to
deliver MIDI and produce audio.
Also, DSSI user interfaces have no obligation to be "graphical". The DSSI UI
mechanism is a simple Open Sound Control protocol, and you can control it
from any OSC client. You can provide many UIs for a single plugin, and the
host will choose one or support many at once -- again, the JACK host is
probably not optimal here as it offers no way for you to specify which UI to
prefer. (I haven't tested it with multiple simultaneous UIs.)
The DSSI package also includes a command-line tool (dssi_osc_send) that you
can use to control the ports, parameters, and configuration of any loaded
DSSI plugin without explicitly using a UI at all.
So most of the bits you need are there, but their organisation can probably be
improved upon. Any suggestions for particular use cases will be warmly
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