Audible found sound, distinct melodies, alternating bass, ⚡ as dropdown

Found sound was inaudible: instr 3 applied amplitude twice (syncgrain amp AND an envelope that peaked at the same amp -> level^2). Now syncgrain runs at unity and the envelope sets the level.

• Melody variety: replaced the mechanical chord-tone arps with distinct rhythmic/contour phrases per style (arpup/arpdown/updown/pentaup each its own shape, octave leaps), and wander is now a rhythmic random…

• Alternating basslines across the song (verse simple, pre-chorus root, verse2/ chorus2 a busier variant) instead of one bass throughout.

• ⚡ transition is now a native dropdown (off/drum fill/riser/sweep/ downlift/impact/reverse/noise) instead of a custom popover that read as a stuck "transition" window.

▶ Play it: Rail Replacement Rapture — a bed-heavy genre where the found-sound layer carries the room https://stellate.app/?genre=transitwave&seed=7196&path=749.12536,768.12569,730.12569&xdur=13.122

94948c3 https://github.com/aboard-io/stellate/commit/94948c3c299e99e91b0da878e5b1a3ef56125f64