Sci-fi hangar ambience (loop)

A 20-second seamless starship-hangar ambience centred on C#. The core is a deep, mono engine hum (a C#1 sub and a C#2 harmonic stack with slow beating partials and an idle throb) over a filtered mono rumble, with a faint wobbling turbine whine riding above it. Two ventilation ducts breathe in stereo (resonant duct hiss with fan-blade flutter). Around them the space speaks: distant metallic clanks, a dropped-tool double clank, a chain rattle and a heavy bulkhead clang, a loader arm's hydraulic servo and a pneumatic hiss, all thrown into a huge metal hall with slap echoes and a long dark tail. Now and then a console nearby chirps: glides, a telemetry burble, an acknowledge tone. The loop starts on a soft clank at frame 0 and is rendered circularly: three identical cycles are synthesised with every oscillator on a 0.05 Hz grid, tails, reverb and the wrap-mode limiter run across them, and the middle cycle is kept, so the last sample flows straight back into the first with no fade. Only the mono engine core sits below 120 Hz.

Metrics

Integrated LUFS

-13.8 LUFS

True peak

-7.3 dBTP

Length

20s · 960,000 samples @ 48000 Hz

Target master

-14 LUFS · peak ≤ -1 dBTP

Checks

Passed

Spectrogram

Generated code

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