---
license: cc-by-4.0
task_categories:
- audio-classification
language:
- en
tags:
- audio-quality
- mos
- ovl
- xacle
pretty_name: OVL (Overall Audio Quality) MOS -- XACLE
dataset_info:
- config_name: per_clip
  features:
  - name: audio_id
    dtype: string
  - name: wave_filename
    dtype: string
  - name: source
    dtype: string
  - name: split
    dtype: string
  - name: mean_score
    dtype: float32
  - name: std_score
    dtype: float32
  - name: median_score
    dtype: float32
  - name: n_ratings
    dtype: int32
  - name: batch
    dtype: string
  splits:
  - name: train
    num_examples: 100
  configs_note: per-clip aggregated MOS
- config_name: per_rating
  features:
  - name: audio_id
    dtype: string
  - name: wave_filename
    dtype: string
  - name: source
    dtype: string
  - name: split
    dtype: string
  - name: score
    dtype: float32
  - name: listener_id
    dtype: string
  - name: batch
    dtype: string
  splits:
  - name: train
    num_examples: 460
configs:
- config_name: per_clip
  data_files:
  - split: train
    path: per_clip/train-*
- config_name: per_rating
  data_files:
  - split: train
    path: per_rating/train-*
---

# OVL (Overall Audio Quality) MOS -- XACLE

Human MOS ratings of **overall audio quality (OVL)** for real **XACLE-train**
audio clips, collected on Amazon Mechanical Turk. OVL here is synonymous with
**AQ (audio quality)**: annotators rate how natural and clean each clip *sounds*
on a 1-5 scale, judging the audio itself -- not what it depicts, and without any
text caption.

Each HIT presented 10 XACLE clips plus 1 hidden reference anchor (a known-good or
known-bad clip) used only to screen annotators; anchors are **excluded** from this
dataset. 4 low-quality assignments flagged on MTurk were rejected and dropped.

## Configs

| config | rows | one row per |
|--------|------|-------------|
| `per_clip`   | 100 | unique XACLE clip -- aggregated MOS |
| `per_rating` | 460 | single (assignment x clip) rating |

### `per_clip`
`audio_id`, `wave_filename` (XACLE-train file), `source` (`xacle`), `split`
(`train`), `mean_score` (MOS), `std_score`, `median_score`, `n_ratings`, `batch`.

### `per_rating`
`audio_id`, `wave_filename`, `source`, `split`, `score` (1-5), `listener_id`
(anonymized worker), `batch`.

Audio is referenced by `wave_filename` (XACLE-train), not embedded.

## Summary

- **100** unique XACLE-train clips, **460** ratings, **9** workers,
  ~4.6 ratings/clip.
- Mean OVL **3.19** (per-clip MOS mean 3.18).
- Inter-annotator agreement: Krippendorff alpha (interval) **0.388**,
  ICC(1,1) **0.392**, ICC(1,k) **0.748**.
- Anchor probe: low anchors mean **2.04**, high anchors mean **4.74**.

`source` is `xacle` for every row; the column exists so RELATE OVL ratings can be
appended to this repo later.