# 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. > More information: . - Start the GUI: `lmms` - Start the GUI and load external config: `lmms --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 --samplerate {{88200}} --format {{ogg}} --loop --output {{path/to/output/file.ogg}}`