Long-form song generation models continue to improve in duration, structural integrity, and acoustic complexity, making reliable aesthetic rewards increasingly important for aligning these models with human preferences. However, reward models for complete songs remain limited, and existing evaluators typically predict scores in a single forward pass without providing readable explanations. We introduce MUSECRITIC, a semi-scalar reward model that generates a natural-language critique covering five aesthetic dimensions and uses it as an intermediate representation to predict continuous reward scores. MUSECRITIC follows a two-stage training pipeline: a teacher model first provides high-quality critiques for supervised fine-tuning, after which the fine-tuned model generates its own critiques for reward learning, mitigating distribution shift between training and inference. On an in-domain test set of 200 SongEval songs, MUSECRITIC reduces macro-averaged mean squared error from 0.2875 to 0.2316 and improves macro-averaged LCC, SRCC, and Kendall's tau to 0.9068, 0.8838, and 0.7178, respectively. On the out-of-domain Music Arena benchmark with 733 preference pairs, it achieves the highest accuracy of 71.35%. Moreover, using MUSECRITIC with GRPO improves Muse-0.6B on all nine aesthetic metrics from SongEval and Audiobox Aesthetics. These results demonstrate that critique-conditioned reward modeling reduces scoring error and provides an effective optimization signal for song generation. The project repository is available at https://github.com/WuqnEl/MuseCritic.
Jiabao Zhuang, Changhao Jiang, Hanchen Wang et al.· 0 citations
Medical AI has produced many radiology models, particularly for chest X-rays (CXR), each excelling at isolated tasks like lesion detection or report generation. However, these models have disparate capabilities and limited generalizability due to training on restricted datasets, making clinical integration challenging. Large language models (LLMs) now enable interfacing heterogeneous models within agentic frameworks that automatically interpret and unify outputs in natural language. In this work, we present RadFabric, an agentic AI system that orchestrates fourteen specialized open-source CXR analytics models and two Vision-Language Models (VLM) through a modular protocol. RadFabric includes an Anatomical Interpretation Agent that grounds visual findings in anatomical context, and a trainable reasoning agent that synthesizes these anatomically-enriched outputs with VLM-generated radiology reports into transparent, step-by-step diagnoses, even when model outputs are heterogeneous or conflicting. This architecture enables explainable, robust diagnoses across common and rare pathologies while facilitating extensibility through additional agents. Evaluation results on the MIMIC-CXR dataset shows that RadFabric can achieve an AUC of 85.18% on task of detecting different legion types from the given CXR, outperforming all state-of-art CXR models. Notably, the reasoning agent particularly improves detection of uncommon findings, demonstrating enhanced interpretability, generalizability, and clinical applicability.
Wenting Chen, Yi Dong, Zhaojun Ding et al.· npj Digital Medicine· 2 citations
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