The Fusor player is the app’s own, and the fader and EQ positions are the loaded fusor’s curves, evaluated by the app’s own curve code. The waveforms show each track as recorded: the EQ does not change them. Color marks the part you hear, drawn at full from the faders’ halfway crossing so the hand-over is easy to see. Gray waveform is audio the deck plays with its fader at zero: heard only in headphones before the run, and not at all after it. The gray diamonds mark each track’s START and END points: where it is when the run starts and when it ends.