# Planet surface ambience

These effects use edited field recordings and foley, with no generated speech
or music. `manifest.json` maps each asset to its source and edits.

## CC0 1.0 public domain recordings

License: https://creativecommons.org/publicdomain/zero/1.0/

- **Thimras — Park ambiences**
  https://opengameart.org/content/park-ambiences
  `park_ambience_wind.wav`: real open-field wind recorded in Adelaide,
  South Australia. Used for the wind loop and natural gusts.
- **Iwan "qubodup" Gabovitch — 20 Rustles of dry leaves**
  https://opengameart.org/content/20-rustles-dry-leaves
  `rustle01.flac`, `rustle04.flac`, `rustle09.flac`: leaf foley recordings.
  Used for foliage beds and individual rustles.
- **isaiah658 — Ambient Bird Sounds**
  https://opengameart.org/content/ambient-bird-sounds
  `birds-isaiah658_0.ogg`: field-recorded birds; independent excerpted calls.
- **Rudmer_Rotteveel — Wood Creak Single V7**
  https://freesound.org/people/Rudmer_Rotteveel/sounds/506662/
  Public high-quality preview of a real wooden-floor creak. Used as quiet
  wood flex/branch-creak foley, with mild pitch and EQ edits.

## CC BY 3.0 recordings — attribution required

**Blender Foundation — Ambient Bird, Cricket and Frog (Yo Frankie!)**
https://opengameart.org/content/ambient-bird-cricket-and-frog
License: https://creativecommons.org/licenses/by/3.0/

`amb_cricket_1.flac` and `amb_frog_1.flac`, from the Blender Foundation's
Yo Frankie! assets, submitted to OpenGameArt by Lamoot. Used for `insects.wav`
and `marsh_call.wav`. Changes: conversion to 48 kHz PCM16 stereo, DC removal,
filtering, smooth fades and a slight pitch reduction on the frog recording.
Retain this credit and license link when distributing these assets or the game.
No endorsement by the original authors is implied.

## Rebuilding

Run `tools/audio/fetch_surface_sources.py`, then
`tools/audio/build_surface_audio.py` (Python, numpy, soundfile).
Output WAVs are 48 kHz, stereo, PCM16. Loops use crossfaded seams. One-shots
retain the recording's natural character and are spatialised in the game.