After installing Hydrogen on your system you can invoke it from the command-line with a number of different options.

-h, --help                  Displays this help.
-v, --version               Displays version information.
-d, --driver <Audiodriver>  Use the selected audio driver (auto, jack, pulseaudio, ...)
-p, --playlist <File>       Load a playlist (*.h2playlist) at startup
-s, --song <File>           Load a song (*.h2song) at startup
-k, --kit <DrumkitName>     Load a drumkit at startup
-i, --install <File>        Install a drumkit (*.h2drumkit)
-V, --verbose <Level>       Level, if present, may be None, Error, Warning, Info, Debug
-L, --log-file <Path>       Alternative log file path
-T, --log-timestamps        Add timestamps to all log messages
-P, --data <Path>           Use an alternate system data path
    --config <Path>         Use an alternate config file
    --layout <Layout>       UI layout ('tabbed' or 'single')
-O, --osc-port <int>        Custom port for OSC connections
-n, --nosplash              Hide splash screen
      

	Note
	Which audio drivers are supported depends on both your platform and its installed packages. Your local help message will display all available options.