The Belgian rave stab (Anasthasia): how the T99 hoover-stab works
T99's Anasthasia (1991) has one of the most menacing sounds in rave: a brass-ish, orchestral, slightly detuned stab that hits like a fist and gets out of the way. Belgian new-beat and early hardcore ran on it. It sounds complicated. It isn't. It's a filter envelope with attitude.
The one idea
Take a thick, detuned sawtooth stack, run it through a resonant lowpass, and make the filter slam shut fast: 90 milliseconds from wide open to nearly closed. That fast filter collapse is the entire character: the sound flares bright and brassy on the attack, then chokes. Hit it and get out.
The recipe
The oscillator stack is five voices, so it's fat and a little dissonant:
| Voice | Detune | Level |
|---|---|---|
| Saw | −22 cents | 0.30 |
| Saw | 0 | 0.34 |
| Saw | +22 cents | 0.30 |
| Square | 0 | 0.22 |
| Square | −1200 cents (octave down) | 0.25 |
Three saws spread ±22 cents give the chorused, detuned body; the two squares (one at pitch, one an octave down) add the hollow, brassy honk and some weight underneath.
The filter is where the magic is:
| Parameter | Value | Why |
|---|---|---|
| Cutoff (start) | 6500 Hz | wide open, the bright flare on the attack |
| Cutoff (end) | 900 Hz | where it chokes to |
| Filter env time | 90 ms | the snap. This is the sound. |
| Resonance (Q) | 7 | enough to whistle at the corner as it moves |
| Amp A/D/S/R | 2ms / 100ms / 0.25 / 140ms | fast in, short sustain, quick release |
| Drive | 6 | grit, applied after the filter |
Why the ordering matters (again)
Same rule as every aggressive rave sound: the distortion goes after the amp envelope and level goes after the distortion. A waveshaper normalises, so if you drive it before the envelope you flatten the dynamics and lose the snap that makes the stab hit. Keep the order oscillators → filter → amp envelope → drive → level → out and the transient stays violent.
Playing it
The stab is rhythmic: it's about placement, not held notes. Short notes, on the off-beats, often in a minor-third or tritone stab pattern for that "Anasthasia" dread. Because the filter env is fixed-time, every hit sounds identical and punchy no matter how you sequence it.
In coproducer, say "a Belgian rave stab, Anasthasia style, on the offbeats", and it builds the patch and the pattern. Then drag the filter-env time down and hear it get nastier.
Open this patch in coproducer →