Low Brass Drone

How it's made

Source

sustained low brass lip pulses, modelled by four band-limited saws at 36-82 Hz, with independent 0.09-0.18 Hz pitch drift and quiet filtered breath turbulence per player.

Body

a conical-bore harmonic spectrum with broad bell emphasis at 520 and 1350 Hz (Q 0.65-0.8). Breath pressure opens a two-pole low-pass from roughly 300 Hz to 2.6 kHz; no nonlinear distortion.

Layers

centred fundamental and triangle support anchor the bass; four horn bodies are spread across the stage, with their lowest frequencies removed below 105 Hz to keep the bass stable.

Envelope

2.5-7 s soft onset, sustained breathing over 10-20 s cycles, and a 3 s eased release. Increasing pressure raises level and upper harmonics together; players have staggered swells.

Variation

seeded phase and tuning offsets, 2-11 cents section detune, and independent air streams. Presets offer a dark pedal, an open fifth, a close minor-second tension, and a soft octave blend.

Space

dry stereo section without baked reverberation, ready for a scoring stage or scene mix.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.