Ableton/Live/UG/29 Audio Effect Reference/32 Reverb/02 Early Reflections

- Early reflections are the first echoes off the walls before the diffuse tail; their level and spacing suggest the room's character.
- Spin modulates them; Amount and Rate set it. More Amount gives a more neutral tail. Too high a Rate causes Doppler pitch shifts and odd panning. Turning Spin off saves some CPU.
- Shape — low values: reflections fade slowly and overlap the tail, for a smoother decay; high values: they fade fast and the tail starts later, which can help clarity.