Ableton Live 9 Intro has the essentials.
Live 9 comes in three editions: Intro, Standard and Suite.
The editions share common features, but Standard and Suite have additional features, Instruments, Packs and Effects.
Here are the features common to all editions of Live 9:
Unique Session View for quick, intuitive composition, flexible performance and improvisationMultitrack recording up to 32-bit/192 kHzNondestructive editing with unlimited undoPowerful MIDI sequencing of software and hardware instrumentsAdvanced warping and real-time time-stretchingUnlimited Instruments, Audio effects and MIDI effects per projectGroup tracksVST and Audio Unit supportTime signature changesMultiple automation lanesTrack FreezeAutomatic plug-in delay compensationMIDI remote control instant mappingMIDI output to hardware synthsMIDI Clock/syncReWireMulticore/multiprocessor supportWAV, AIFF, MP3, Ogg Vorbis, FLAC file support