OBERON-8

Create a fully functional, professionally architected polyphonic audio synthesizer and look-ahead step sequencer in a single HTML file. No external dependencies.
Requirements:
Playable with a computer keyboard (Z-M row = lower octave, Q-I row = upper octave, with standard black key spacing) and a clickable visual keybed.
The UI must be a meticulous, photorealistic hardware console. Modules must be purposefully housed, spatially logical, and visually distinct (chassis, screws, paneling, bezels). Do not use standard web forms.
True analog-modeled polyphony (at least 8 simultaneous voices) with intelligent oldest-note voice stealing.
At least 3 waveform types: sine, square, sawtooth (selectable via hardware-style switches).
Voltage Controlled Amplifier (VCA) and Voltage Controlled Filter (VCF) driven by an ADSR envelope.
ADSR controls must be vertical sliders. Filter Cutoff, Resonance, and Envelope Modulation amount must be rotary knobs.
DSP Effects: Custom-generated Plate Reverb (using a synthesized impulse response) and a Delay line (adjustable time, feedback, and mix).
Octave shift controls.
Visual displays: A CRT-style green phosphor oscilloscope showing real-time waveforms, and a segmented LED VU meter reacting accurately to output levels.
All knobs and sliders must be fully interactive (click and vertical drag to adjust).
Award-winning DSP engineering: Flawless gain staging, a master bus limiter to entirely prevent clipping, and asymptotic/exponential envelope curves to prevent zero-crossing audio clicks.
Built-in Sequencer: Implement a sample-accurate, look-ahead step sequencer. It must bypass JavaScript main-thread timing jitter to ensure mathematically perfect playback. The sequence engine must be robust enough to handle massive arrays of note data without performance drops.
Musical Composition: You must compose and program three distinct, full-length musical arrangements into the sequencer. Triggering a track must automatically update the synth's UI parameters (preset) to match the genre.
Crucial Track Requirements: Each track must be a full, uniquely evolving song that lasts at least 30 seconds from start to finish. You are strictly forbidden from just looping a 4-bar or 8-bar pattern. Each song must feature clear structural progression (e.g., intro, rising action, climax/chorus, melodic variations, or bridges), must not feel repetitive, and must feel like a complete musical thought. The tracks must be:
A Disco arrangement (requiring tight ADSR decay, snappy filter envelopes, syncopated basslines, and evolving chord progressions).
A Video Game / Arcade Boss arrangement (requiring pure square waves, zero-release gate times, high-speed precision arpeggios, and intense melodic switch-ups).
A genre of your choosing (e.g., Synthwave) that heavily demonstrates massive polyphony, deep delay lines, analog-modeled filter sweeps, and an atmospheric, cinematic progression.