AIR-Bench-Foundation

Overview

AIR-Bench Foundation is the discriminative half of AIR-Bench (Audio InstRuction Benchmark, ACL 2024 main conference) — the first instruction-following benchmark for large audio-language models (LALMs), covering human speech, natural sounds and music. The Foundation track contains roughly 25k single-choice questions spanning 19 logical tasks across three audio categories.

Task Description

Task Type: Single-choice question answering grounded on an audio clip.
Input: One audio clip + a question with up to four candidate answers (A/B/C/D).
Output: A single letter chosen from the provided options.

Categories (19 tasks / 25 source-dataset subsets)

Speech (11 dirs / 9 tasks): speech grounding, language ID, gender, emotion (IEMOCAP+MELD), age, speech entity recognition, intent classification, speaker counting, synthesized-voice detection.
Sound (6 dirs / 4 tasks): audio grounding, vocal sound classification, acoustic scene classification (CochlScene+TUT2017), sound QA (avqa+clothoaqa).
Music (8 dirs / 6 tasks): instruments, genre, MIDI pitch, MIDI velocity, music QA, music emotion.

Prompt Template (matches official `Inference_Foundation.py`)

Choose the most suitable answer from options A, B, C, and D to respond the question in next line, you may only choose A or B or C or D.
{question}
A. {choice_a}
B. {choice_b}
C. {choice_c}
D. {choice_d}

Dataset Access

The dataset is hosted on ModelScope: evalscope/AIR-Bench-Dataset. It uses an audiofolder + JSON metadata layout. evalscope downloads it lazily via modelscope.dataset_snapshot_download on first run; the full release is ~49 GB, so it is recommended to limit which subsets are pulled via extra_params.
If the dataset is already on disk, pass dataset_args={'air_bench_foundation': {'local_path': '/path/to/AIR-Bench-Dataset'}}; the local root should contain Foundation/.
Some Foundation samples are FLAC. For OpenAI-compatible audio input evalscope converts them to cached WAV files, which requires either soundfile (pip install "evalscope[air_bench]") or a working ffmpeg binary.

Evaluation Notes

Metric: accuracy (per source-dataset subset, plus per-category aggregation).
Default prompt follows the official Inference_Foundation.py formatting so existing AIR-Bench leaderboard numbers can be reproduced.
Set extra_params={'subsets': [...]} to limit to a subset of the 25 source directories — useful for partial downloads.

Properties

Property	Value
Benchmark Name	`air_bench_foundation`
Dataset ID	evalscope/AIR-Bench
Paper	Paper
Tags	`Audio`, `Knowledge`, `MCQ`
Metrics	`acc`
Default Shots	0-shot
Evaluation Split	`test`

Data Statistics

Metric	Value
Total Samples	21,426
Prompt Length (Mean)	236.68 chars
Prompt Length (Min/Max)	179 / 321 chars

Per-Subset Statistics:

Subset	Samples	Prompt Mean	Prompt Min	Prompt Max
`Speaker_Age_Prediction_common_voice_13.0_en`	1,000	291.98	278	305
`Speaker_Emotion_Recontion_iemocap`	1,000	227.13	218	238
`Speaker_Emotion_Recontion_meld`	1,000	233.21	218	250
`Speaker_Gender_Recognition_common_voice_13_en`	780	226.19	213	241
`Speaker_Gender_Recognition_meld`	1,000	226.42	213	241
`Speaker_Intent_Classification_slurp`	662	268.52	232	295
`Speaker_Number_Verification_voxceleb1`	314	208.24	194	221
`Speech_Entity_Reconition_slurp`	1,000	253.14	226	316
`Speech_Grounding_librispeech`	981	253.92	230	282
`Spoken_Language_Identification_covost2`	495	207.12	191	232
`Synthesized_Voice_Detection_fake_or_real`	1,000	224.79	203	242
`Acoustic_Scene_Classification_CochlScene`	1,000	240.97	213	278
`Acoustic_Scene_Classification_TUT2017`	1,000	241.72	207	284
`Audio_Grounding_AudioGrounding`	896	273.74	249	321
`Sound_AQA_avqa`	1,000	227.21	193	298
`Sound_AQA_clothoaqa`	1,000	199.89	179	262
`vocal_sound_classification_VocalSound`	985	232.62	210	253
`Music_AQA_music_avqa`	814	208.7	185	238
`Music_Genre_Recognition_MTJ-Jamendo`	1,000	223.84	200	248
`Music_Genre_Recognition_fma`	1,000	224.59	201	250
`Music_Instruments_Classfication_MTJ-Jamendo`	1,000	236.52	218	262
`Music_Instruments_Classfication_nsynth`	996	228.12	216	247
`Music_Midi_Pitch_Analysis_nsynth`	493	253.88	243	264
`Music_Midi_Velocity_Analysis_nsynth`	484	270.6	259	279
`Music_Mood_Recognition_MTJ-Jamendo`	526	229.67	210	248

Audio Statistics:

Metric	Value
Total Audio Files	21,426
Audio per Sample	min: 1, max: 1, mean: 1
Formats	mp3, wav

Sample Example

Subset: Speaker_Age_Prediction_common_voice_13.0_en

{
  "input": [
    {
      "id": "544443c0",
      "content": [
        {
          "audio": "[BASE64_AUDIO: mp3, ~25.9KB]",
          "format": "mp3"
        },
        {
          "text": "Choose the most suitable answer from options A, B, C, and D to respond the question in next line, you may only choose A or B or C or D.\nWhich age range do you believe best matches the speaker's voice?\nA. teens to twenties\nB. thirties to fourties\nC. fifties to sixties\nD. seventies to eighties"
        }
      ]
    }
  ],
  "target": "B",
  "id": 0,
  "group_id": 0,
  "subset_key": "Speaker_Age_Prediction_common_voice_13.0_en",
  "metadata": {
    "uniq_id": 5973,
    "task_name": "Speaker_Age_Prediction",
    "dataset_name": "common_voice_13.0_en",
    "category": "speech",
    "answer_gt_text": "thirties to fourties",
    "choices": {
      "A": "teens to twenties",
      "B": "thirties to fourties",
      "C": "fifties to sixties",
      "D": "seventies to eighties"
    }
  }
}

Prompt Template

Prompt Template:

Choose the most suitable answer from options A, B, C, and D to respond the question in next line, you may only choose A or B or C or D.

Extra Parameters

Parameter	Type	Default	Description
`subsets`	`list`	`None`	Optional list of Foundation source-dataset directories to evaluate. Defaults to all 25 directories. Useful when only a subset has been downloaded locally.

Usage

Using CLI

evalscope eval \
    --model YOUR_MODEL \
    --api-url OPENAI_API_COMPAT_URL \
    --api-key EMPTY_TOKEN \
    --datasets air_bench_foundation \
    --limit 10  # Remove this line for formal evaluation

Using Python

from evalscope import run_task
from evalscope.config import TaskConfig

task_cfg = TaskConfig(
    model='YOUR_MODEL',
    api_url='OPENAI_API_COMPAT_URL',
    api_key='EMPTY_TOKEN',
    datasets=['air_bench_foundation'],
    dataset_args={
        'air_bench_foundation': {
            # subset_list: ['Speaker_Age_Prediction_common_voice_13.0_en', 'Speaker_Emotion_Recontion_iemocap', 'Speaker_Emotion_Recontion_meld']  # optional, evaluate specific subsets
            # extra_params: {}  # uses default extra parameters
        }
    },
    limit=10,  # Remove this line for formal evaluation
)

run_task(task_cfg=task_cfg)

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