The moment the lead synth arpeggio kicks in on “Insomnia” (Faithless), is a total classic riff.

It’s a rising, rapid arpeggio. The lead isn’t just a chord — it’s a fast-moving sequence of notes climbing and cascading, which inherently feels more energetic and forward-driving than sustained chords. Arpeggios in trance are almost always designed to feel like they’re “lifting” the track.

It arrives after a long, tension-building intro. The track spends a good chunk of time in a moodier, more restrained loop (with Maxi Jazz’s vocal and a sparser groove) before that lead drops. By the time it hits, there’s been a release of pent-up energy — the contrast makes it feel much louder and brighter than it would in isolation.

Bright, filtered synth timbre with a resonant sweep. Classic trance leads (this one included) use a sawtooth-based synth with a resonant filter, often swept open right as the lead enters. That filter opening from muffled/dark to full brightness is a big part of why it feels like a sudden flood of light and energy.

Minor-to-major emotional lift within the melody. The Insomnia lead sits over a chord progression that has that bittersweet trance quality — moody undertones but with melodic movement that arcs upward, giving it an uplifting, anthemic quality rather than pure darkness.

Layering and stereo widening. When the lead comes in, it’s typically doubled, layered, and spread across the stereo field, which makes it feel physically bigger and louder even without dramatically increasing volume.

The four-on-the-floor kick locks in underneath it. The rhythmic foundation reinforces the sense of momentum, so the lead feels like it’s riding on top of a wave rather than existing on its own.