Your whole REAPER session, by voice. Every track, every plugin, every menu, the transport, the mix, loops, MIDI, automation and renders — say it, and REAPER does it.
A session is hundreds of small moves: arm a track, load a synth, pull a fader, find a loop, set the tempo, mark the chorus, bounce the stems. Every one of them means stopping the music to go looking for a menu.
Master REAPER is a voice engineer sitting inside your session. Talk to it the way you'd talk to an assistant engineer — “put a Prophet on a new track”, “turn the bass down a little”, “loop bars nine to seventeen”, “give me a disco break” — and it happens in REAPER, on the real tracks, while you keep playing.
It knows every track and every plugin in the session by name, runs any REAPER action or menu item, and knows the REAPER manual and scripting reference by heart, so “how do I…” gets a real answer.

“Turn the Jup-8 up to 70.” “Mute the drums.” “Bring back the bass.” Master REAPER sets track levels, mutes and unmutes, loads plugins onto tracks, applies your saved FX chains, freezes tracks to audio and resets any plugin to a clean slate — all by the track names in your session.

Set or read any parameter on any plugin: “open the filter on the Mini”, “what's the cutoff on the Prophet?”, “more release on the pad”. Or shape it by feel — brighter, darker, warmer, fatter, punchier, wetter — and tell it “perfect” or “too much”. It learns your taste, so next time “warmer” means your warmer.
It can draw automation too: “open the filter over the next eight bars” becomes a real automation ramp on the plugin.



Lay out the song — “intro four, verse sixteen, chorus eight” — and the regions appear on the timeline. Ask for a bassline, a chord progression or an arpeggio and it writes the MIDI onto the track. Set the tempo, loop a span of bars, and drop in loops by name or by feel from a library of more than 32,000 drum, bass and instrument loops.

With EAR·SAY on your tracks, Master REAPER hears every one of them at once. It can tell you what's masking the vocal, how the balance sits, how the master is doing, and how your mix compares to a reference — and it dims the monitors while you talk to it.
Keep your hands on the instrument and your ears on the music. Master REAPER runs the session.