Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get A355F71GHC@1 --preset b-movie -o saucer-hover.wav
How it's made
Source
a retro B-movie saucer is a pure electronic tone, not a machine. A sine "carrier" around 300 Hz is frequency-modulated by two low-frequency oscillators: a fast vibrato (about 6 Hz, a few percent) and a slow wobble (about 0.5 Hz, up to a minor third) that gives the eerie warble.
Beating
a second sine a hair off a perfect fifth above, sharing the modulation, makes the interval breathe and shimmer; a quiet sine one octave below anchors the pitch.
Body
a very soft low drive hum (lowpassed saw, tremolo tied to the wobble) suggests the hovering engine.
Air
pink noise through a slowly drifting band-pass adds a faint downdraft hiss under the tones.
Envelope
steady, a loop; the wobble and the amplitude swell move slowly so no two seconds are identical.
Space
left and right use different modulation phases, so the saucer slowly circles in the stereo field.
Variation
drift modulators and tuning offsets come from the seeded rng.
Parameters
Parameter
Range
Default
Unit
Controls
pitch
180 – 520
300
Hz
Pitch
wobble
0.2 – 1.5
0.5
Hz
Wobble rate
depth
0 – 1
0.5
—
Wobble depth
vibrato
0 – 1
0.4
—
Vibrato
eerie
0 – 1
0.5
—
Eeriness
air
0 – 1
0.3
—
Downdraft
seed
int
1
—
Variation, reproducible
The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.