Vellum Ambience SFX

Vellum Ambience SFX is a 3-sound set built from sine and triangle tones with no distortion at any stage. It is meant to sound like a modern phone or console interface, and every clip was synthesised from scratch for this pack — no sampled material, no library content, no model output — which is what makes it safe to hand over under a licence you can actually ship with.

Nothing in this set is loud, nothing is bright and nothing rings: the longest clip is under half a second and the room is short enough to feel like an interface rather than a space. Built to be heard hundreds of times an hour without wearing out.

An ambience bed is judged on one thing: whether it loops without a click. That is harder than it sounds, because a fade at each end is not a loop, it is a gap. These beds are built so the tail sums back into the head and every modulation completes a whole number of cycles inside the loop, and the build measures the discontinuity at the wrap point and refuses anything audible.

The set covers 3 files totalling 24.0 seconds, from 8000 ms (room-tone) to 8.00 s (room-tone). Levels are matched across it: each clip peaks at -1 dBFS with silence trimmed from both ends and a 5 ms fade, so you can drop the folder into one mixer group and set a single volume instead of balancing them one at a time.

Files are 44.1 kHz mono, 16-bit WAV masters with OGG Vorbis alongside, in wav/ and ogg/ folders. The OGG folder is 242 kB against 2067 kB of WAV, so ship the OGG unless you need sample-accurate source. The WAV is the master either way — reach for it if you are going to pitch-shift or process further, because re-encoding a lossy file after processing is where artefacts come from.

Good fit for mobile games, menu-heavy strategy titles, editors and tools.

Creative Commons Zero 1.0 — Public domain. No credit required. Full terms · What this means in practice