# Knowing What to Stress: A Discourse-Conditioned Text-to-Speech Benchmark

arXiv: https://arxiv.org/abs/2604.10580 · HTML: https://mlsanity.com/paper/2604.10580/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- Builds on 9 of its 17 references that are in the map.
- First posted on arXiv 12 Apr 2026.

## Builds on (most cited first, 9 of 9)

- [Style Tokens: Unsupervised Style Modeling, Control and Transfer in End-to-End Speech Synthesis](https://mlsanity.com/paper/1803.09017/) (2018)
- [Towards End-to-End Prosody Transfer for Expressive Speech Synthesis with Tacotron](https://mlsanity.com/paper/1803.09047/) (2018)
- [CosyVoice 3: Towards In-the-wild Speech Generation via Scaling-up and Post-training](https://mlsanity.com/paper/2505.17589/) (2025)
- [Qwen3-TTS Technical Report](https://mlsanity.com/paper/2601.15621/) (2026)
- [ProsAudit, a prosodic benchmark for self-supervised speech models](https://mlsanity.com/paper/2302.12057/) (2023)
- [EmphAssess : a Prosodic Benchmark on Assessing Emphasis Transfer in Speech-to-Speech Models](https://mlsanity.com/paper/2312.14069/) (2023)
- [WHISTRESS: Enriching Transcriptions with Sentence Stress Detection](https://mlsanity.com/paper/2505.19103/) (2025)
- [StressTest: Can YOUR Speech LM Handle the Stress?](https://mlsanity.com/paper/2505.22765/) (2025)
- [Crowdsourced and Automatic Speech Prominence Estimation](https://mlsanity.com/paper/2310.08464/) (2023)

## Built on by (most cited first, 1 of 1)

- [EmphTTS: an emphasis-control TTS with reinforcement learning](https://mlsanity.com/paper/2609.27599/) (2026)

## Abstract (arXiv)

Spoken meaning often depends not only on what is said, but also on which word is emphasized. The same sentence can convey correction, contrast, or clarification depending on where emphasis falls. Although modern text-to-speech (TTS) systems generate expressive speech, it remains unclear whether they infer contextually appropriate stress from discourse alone. To address this gap, we present Context-Aware Stress TTS (CAST), a benchmark for evaluating context-conditioned word-level stress in TTS. Items are defined as contrastive context pairs: identical sentences paired with distinct contexts requiring different stressed words. We evaluate state-of-the-art systems and find a consistent gap: text-only language models reliably recover the intended stress from context, yet TTS systems frequently fail to realize it in speech. We release the benchmark, evaluation framework, construction pipeline and a synthetic corpus to support future work on context-aware speech synthesis.