# lmms > Free, open source, cross-platform digital audio workstation. > Render a `.mmp` or `.mmpz` project file, dump a `.mmpz` as XML, or start the GUI. > See also: `mixxx`. > More information: . - Start the GUI: `lmms` - Start the GUI and load external config: `lmms {{[-c|--config]}} {{path/to/config.xml}}` - Start the GUI and import MIDI or Hydrogen file: `lmms --import {{path/to/midi_or_hydrogen_file}}` - Start the GUI with a specified window size: `lmms --geometry {{x_size}}x{{y_size}}+{{x_offset}}+{{y_offset}}` - Dump a `.mmpz` file: `lmms dump {{path/to/mmpz_file.mmpz}}` - Render a project file: `lmms render {{path/to/mmpz_or_mmp_file}}` - Render the individual tracks of a project file: `lmms rendertracks {{path/to/mmpz_or_mmp_file}} {{path/to/dump_directory}}` - Render with custom samplerate, format, and as a loop: `lmms render {{[-s|--samplerate]}} {{88200}} {{[-f|--format]}} {{ogg}} {{[-l|--loop]}} {{[-o|--output]}} {{path/to/output_file.ogg}}`