MECAT: A Multi-Experts Constructed Benchmark for Fine-Grained Audio Understanding Tasks
This work addresses the problem of evaluating detailed audio understanding for researchers and developers in audio-language modeling, though it is incremental as it builds on existing benchmarks and metrics.
The paper tackles the gap in nuanced audio understanding by introducing MECAT, a benchmark for fine-grained audio tasks, and a novel metric DATE, which penalizes generic outputs and rewards detailed descriptions, showing that current models still fall short of human-level comprehension.
While large audio-language models have advanced open-ended audio understanding, they still fall short of nuanced human-level comprehension. This gap persists largely because current benchmarks, limited by data annotations and evaluation metrics, fail to reliably distinguish between generic and highly detailed model outputs. To this end, this work introduces MECAT, a Multi-Expert Constructed Benchmark for Fine-Grained Audio Understanding Tasks. Generated via a pipeline that integrates analysis from specialized expert models with Chain-of-Thought large language model reasoning, MECAT provides multi-perspective, fine-grained captions and open-set question-answering pairs. The benchmark is complemented by a novel metric: DATE (Discriminative-Enhanced Audio Text Evaluation). This metric penalizes generic terms and rewards detailed descriptions by combining single-sample semantic similarity with cross-sample discriminability. A comprehensive evaluation of state-of-the-art audio models is also presented, providing new insights into their current capabilities and limitations. The data and code are available at https://github.com/xiaomi-research/mecat