TTS-based coaching pipeline: anchor and target exemplars, chunked recording, alignment, and focused drills¶

Strategy · All strategies
Evidence · no claims cited

Description¶

Generalizing from prior systems and grounded in shadowing pedagogy, the survey describes a four-step pipeline: "render ananchorexemplar at a conservative tempo (120–140 WPM) and an optionaltargetat a faster tempo (150–170 WPM)"; record the learner in short chunks of 5–12 s per section; align learner audio with the reference using CTC or DTW and compute deviations; and surface focused drills based on the highest-error dimensions. Effective exemplars tend to be short (under 12 s) to prevent cognitive overload.

Design Implications¶

Context¶

Requirements¶

• Neural TTS with controllability over rate, pauses, and emphasis; alignment via CTC or DTW; exemplars offered in multiple speed bands and vocabulary difficulty gradations.

Constraints¶

• Known limitations include over-constraining style when exemplars are treated as a single correct read, and synthetic emphasis that may not match domain conventions.

Target Learners¶

• L2 English speakers rehearsing slide-based presentations

Target Learning Goals¶

• Improved pronunciation, lexical stress, prosody, and pacing through exemplar-guided shadowing practice

Related Strategies¶

• Create small controlled presentation mini-sets as a near-term community benchmark

Examples¶

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Key Sources¶

• Wen Liang, Li Siyan, Zackary Rackauckas, and Julia Hirschberg. (2026). A Survey of Automated Presentation Coaching: Systems, Methods, and Open Challenges. https://arxiv.org/abs/2606.27380