Supported backends and features

Audio backends

Name	OS/system	Features	Note
JACK	Cross-platform	Audio playback	Doesn't support JACK transport yet. Only exposes the master output port.
ALSA	Linux	Audio playback
PortAudio	Cross-platform	Audio playback	Some buggy drivers may crash LMMS on Windows.
SDL	Cross-platform	Audio playback	1.2.x or older don't support SDL 2.
PulseAudio	Linux	Audio playback
OSS	Unix-like	Audio playback

MIDI backends

Name	OS/system	Features	Note
ALSA	Linux	Basic MIDI I/O	Supports both raw mode and sequenced mode.
WinMM	Windows	Basic MIDI I/O
Apple	macOS	Basic MIDI I/O
JACK	Cross-platform	MIDI input	MIDI output isn't supported at this moment.