| --- |
| license: other |
| license_name: replica-derived |
| license_link: https://github.com/facebookresearch/Replica-Dataset/blob/main/LICENSE |
| pretty_name: Unity + SoundSpaces 2.0 Spatial Audio Dataset (Replica) |
| task_categories: |
| - audio-classification |
| - other |
| tags: |
| - spatial-audio |
| - binaural |
| - room-impulse-response |
| - soundspaces |
| - replica |
| - audio-visual |
| size_categories: |
| - 1K<n<10K |
| --- |
| |
| # Unity + SoundSpaces 2.0 Spatial Audio Dataset (Replica) |
|
|
| Audio-visual spatial-audio dataset built by placing sound-emitting objects in |
| 17 Replica indoor scenes with a Unity/PhysX physical placement stage, then |
| rendering **binaural room impulse responses (RIR)** with |
| [SoundSpaces 2.0](https://github.com/facebookresearch/sound-spaces) (habitat-sim |
| `AudioSensor`, per-class acoustic materials). Each case ships the listener's |
| first-person render, per-source binaural RIRs, dry source audio, the |
| RIR-convolved per-source audio, a mixed binaural track, and full geometric |
| metadata (2D/3D bounding boxes, listener-local source directions). |
|
|
| ## Scenes (17) |
|
|
| `office_0..4`, `room_0..2`, `hotel_0` (small), |
| `frl_apartment_0..5`, `apartment_0..1` (large). |
|
|
| `apartment_2` is excluded from the QA100 release because the Unity/PhysX |
| placement stage was unstable for that scene on the current generation setup. |
|
|
| ## Augmentations (per scene) |
|
|
| | variant | ratio | description | |
| |---|---|---| |
| | `no_arg` | 40% | placed objects as-is | |
| | `color_arg` | 20% | object color randomized | |
| | `scale_arg` | 20% | object scale randomized | |
| | `color_scale_arg` | 20% | both | |
|
|
| ## Directory layout |
|
|
| ``` |
| <scene>/<augmentation>/case_<id>/ |
| ├── soundspaces/ |
| │ ├── coords.json # full metadata (schema below) |
| │ ├── unity_fpv.png # listener first-person render (1280x960) |
| │ ├── soundspaces_validation_spheres.png |
| │ ├── unity_fpv_vs_soundspaces_spheres.png |
| │ ├── rir_src01_*.npy # binaural RIR, shape (2, N), float64 |
| │ ├── audio_src01_*.wav # dry source convolved with its RIR (16 kHz, stereo) |
| │ └── audio_mix.wav # all sources mixed (16 kHz, stereo) |
| └── unity/ |
| └── unity_coords.json # raw Unity-side placement output |
| ``` |
|
|
| ## Audio format |
|
|
| - **Sample rate**: 16 kHz, **stereo (binaural)**, float. |
| - **RIR**: NumPy `(2, N)` `float64`. **Channel 0 = LEFT ear, channel 1 = RIGHT ear.** |
| Per-source audio = `fftconvolve(dry_signal, rir[channel])`. |
|
|
| ## `coords.json` schema — coordinate systems & directionality |
|
|
| Each case stores geometry in **two coordinate frames**: |
|
|
| | axis | Unity (left-handed) | Habitat / SoundSpaces (right-handed) | |
| |---|---|---| |
| | X | + = right | + = right (same) | |
| | Y | + = up | + = up (same) | |
| | Z | **+ = camera forward** | **+ = camera backward** (sign flipped) | |
|
|
| Conversion: `habitat = (x, y, -z)`. Listener facing: |
| `soundspaces_yaw = (90 + unity_yaw) % 360` (the +unity_yaw accounts for the yaw |
| direction reversed by the Z-flip; using `90 - unity_yaw` mirrors the X axis and |
| swaps the binaural L/R channels — that bug is fixed in this release). |
|
|
| Top-level keys: |
| - `scene`, `unity_yaw_deg`, `soundspaces_yaw_deg`, `image_width`, `image_height`, |
| `camera_intrinsic` `[fx, fy, cx, cy]` |
| - `listener_unity_world` / `listener_habitat` `[x, y, z]`, `ear_height_offset_m` |
| - `acoustic_materials` (per-class material mapping report; 101 Replica classes) |
| - `sources`: list, each with: |
| - `asset`, `class_num`, `audio_path`, `surface_mode`, `source_origin` |
| - `unity_world_xyz` / `habitat_xyz` — source position in each frame |
| - **`listener_local_xyz`** — source in **listener-facing local frame**, the key |
| directional field: |
| - **x < 0 = LEFT**, x > 0 = right |
| - **z > 0 = FRONT**, z < 0 = behind |
| - y = up/down |
| - `bbox_2d` `[x0, y0, x1, y1]` pixels (`xyxy_top_left_pixels`) |
| - `bbox_3d_unity_world` / `bbox_3d_habitat` — axis-aligned `[min_xyz, max_xyz]` |
| - `scale_multiplier`, `object_yaw_deg`, `rotation_euler_deg`, `color_rgb` |
| - `rir_file`, `wav_file`, `rir_shape` |
| |
| > **Binaural directionality note**: for sources clearly off-axis (≳15°), the |
| > direct-path arrival lands in the correct ear (`listener_local_xyz.x < 0` → |
| > louder/earlier LEFT). For near-frontal sources (≲10°) the direct-path level |
| > difference is tiny and early room reflections in asymmetric rooms can dominate |
| > the per-channel energy — this is expected binaural physics, not a labeling error. |
|
|
| ## Licensing & attribution — READ BEFORE PUBLIC RELEASE |
|
|
| This dataset is **derived from the Replica Dataset** (meshes, renders, semantic |
| classes). Replica is distributed under its own research license, which |
| **restricts redistribution**. Rendered images and semantic-derived fields here |
| inherit those terms. Confirm you are permitted to redistribute Replica-derived |
| content before making this dataset public. |
| - Replica: https://github.com/facebookresearch/Replica-Dataset (see LICENSE) |
| - SoundSpaces 2.0: https://github.com/facebookresearch/sound-spaces |
| - Placed-object audio assets (`data/Effect_Object/...`): verify their individual |
| licenses are compatible with redistribution. |
|
|
| ## Citation |
|
|
| If you use this dataset, please cite Replica and SoundSpaces 2.0. |
|
|
