Psytrance

Psytrance — short for psychedelic trance — runs at 140-150 BPM with a four-on-the-floor kick and, crucially, a fast 16th-note bassline that pulses on every off-beat in the gap between kicks. The result is a relentless 'kick-bass-kick-bass' pattern that drives the whole track. The lead synth is usually a heavily modulated, often acid-bass-inspired patch that mutates across long stretches rather than playing a fixed melody. Tracks run eight to twelve minutes with very few breakdowns, designed for sustained outdoor dancing rather than dancefloor moments.

Psytrance grew directly out of 1990s Goa trance as the scene moved off the Goa beaches and onto a global festival circuit. By the late 1990s producers including Astrix, Infected Mushroom, GMS, and Hallucinogen had pushed the sound harder and cleaner; the genre then split into several branches — full-on psytrance, dark psy, forest psy, progressive psytrance — each with its own tempo and texture preferences. Israel became one of the dominant scenes, alongside Portugal, Germany, and Brazil. Boom Festival in Portugal (since 1997) and Universo Paralello in Brazil are the genre's two largest outdoor festivals, each drawing tens of thousands of attendees for multi-day events.

The off-beat 16th-note bass is the single clearest identifier — once you can hear the bass note in the space between every kick, the genre is recognisable in two bars. The lead synth is usually a slowly mutating patch rather than a melodic line: filters, LFOs, and resonance changes are doing more work than the notes themselves. Tracks build slowly across minutes rather than through dramatic drops, so the listening reward is in the gradual accumulation of layers.

For the commercial peak, Astral Projection, 'Dancing Galaxy' (1997). For the harder, more melodic end, Infected Mushroom, 'The Gathering' (1999). For a defining later track, Astrix, 'Eye to Eye' (2002).

Boom Festival in Portugal explicitly markets itself as more than a music event — it includes a permaculture programme, an art gallery, and a 'Liminal Village' of talks on philosophy and psychology. The festival has won UN-affiliated awards for its sustainability work, an unusual profile for a dance-music gathering.