EXAM2: Extending Audio Understanding in Multilingual and Multimodal Analysis
Organizations: University of Munich, Germany · School of Artificial Intelligence, The Chinese University of Hong Kong, Shenzhen, China · Kyoto University, Japan · A*STAR, Singapore
Abstract
Recent large audio language models (LALMs) have achieved impressive progress in audio understanding. However, existing evaluations remain largely constrained to English and narrow audio domains. Prior benchmarks typically focus on a single audio modality, i.e., speech, sound, or music, limiting the systematic investigation into how these models generalize across diverse visual scenarios. In this paper, we introduce EXAM, a benchmark for multilingual and multimodal audio understanding spanning six languages and multiple modalities, including speech, sound, music, mixed-audio settings, and visual images. By incorporating visual information alongside heterogeneous audio inputs, EXAM enables more realistic evaluation of scene-aware audio reasoning and cross-modal comprehension. EXAM comprises multiple-choice questions, image instances, and multilingual translations. We evaluate state-of-the-art open-source and proprietary LALMs as well as multimodal LLMs, revealing substantial performance gaps in multilingual and cross-modal understanding. Furthermore, we propose Gemma3n-EXAM, a lightweight fusion-model fine-tuned on EXAM-train, achieves up to improvement in multilingual settings and gains in multimodal evaluation over a strong baseline. Empirical results establish EXAM as a challenging benchmark and pioneer future multilingual and multimodal audio intelligence research.
Figures & tables
| Benchmark | Text | Audio | Vision | Language | |||||
|---|---|---|---|---|---|---|---|---|---|
| Tr / Ca | Sp / So / Mu / Mix | Image | EN | DE | ES | JA | MS | ZH | |
| Clotho | ✘ / ✔ | ✔ / ✔ / ✔ / ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ | ✘ |
| Clotho-AQA | ✘ / ✘ | ✘ / ✔ / ✘ / ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ | ✘ |
| LibriSQA | ✘ / ✘ | ✔ / ✘ / ✘ / ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ | ✘ |
| Dynamic-SUPERB | ✘ / ✘ | ✔ / ✘ / ✘ / ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ | ✘ |
| MusicBench | ✘ / ✘ | ✘ / ✘ / ✔ / ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ | ✘ |
| Benchmark | Statistics | Number |
| EXAM 2 -test | Question | 998 |
| Audio Domains | 3 | |
| Domain Categories | Speech / Sound / Music | |
| Category Distribution | 333:333:332 (1:1:1) | |
| Visual Choices | 3,938 | |
| Languages | EN / DE / ES / JA / MS / ZH |
| Model | Input Modality | German | English | Spanish | ||||
| Image | Audio | Speech / Sound / Music | Avg. | Speech / Sound / Music | Avg. | Speech / Sound / Music | Avg. | |
| Closed-source | ||||||||
| GPT-4o-mini-audio | ✘ | ✔ | 75.08 / 59.46 / 56.63 | 63.72 | 74.77 / 59.16 / 57.53 | 63.82 | 71.47 / 62.46 / 59.34 | 64.42 |
| GPT-4o-audio | ✘ | ✔ | 78.98 / 70.87 / 70.18 | 73.34 | 77.18 / 72.67 / 71.39 | 73.75 | 75.98 / 75.08 / 72.29 | 74.45 |
| GPT-4o † | ✔ | ✓ | 65.77 / 69.07 / 57.23 | 64.02 | 68.77 / 70.57 / 59.64 | 66.33 | 67.57 / 68.17 / 59.04 | 64.93 |
| GPT-5-mini † | ✘ | ✓ | 72.37 / 51.05 / 54.22 | 59.21 | 72.67 / 55.56 / 55.72 | 61.32 | 72.67 / 50.45 / 55.12 | 59.41 |
| Test Lang. | Train Lang. | Modality | Accuracy (%) | |
|---|---|---|---|---|
| Speech / Sound / Music | Avg. | |||
| EN | ALL | Audio+Image | 64.6 / 62.2 / 59.9 | 62.2 |
| EN | Audio+Image | 61.9 / 58.0 / 56.6 | 58.8 | |
| ALL | Audio | 67.0 / 57.7 / 61.1 | 61.9 | |
| ALL | Image | 40.5 / 43.5 / 43.4 | 42.5 | |
| - | Image | 30.3 / 33.9 / 38.5 | 34.3 | |
Appendix figures & tables5 assets
Supplementary material from the paper’s appendix.
Appendix
| Hyperparameter | Value |
| Data Type | bfloat16 |
| Learning Rate | 2e-4 |
| Batch Size | 4 |
| Gradient Accumulation Steps | 8 |
| Training Epochs | 6 |
| Lora Alpha | 32 |
Audio Understanding
Audio understanding enables machines to recognize speech, sounds, music, speakers, and events, then answer questions grounded in what they hear.
See all 215 papers