[TTS]一百二十户，"一" 无法正确变调

Description

Contributor guide

Tech stack

python

Domain

ai

Issue type

bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

Chinese phoneticsPythonPaddleSpeech TTS frontend

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

70

Research direction

The bug is in tone sandhi.py at line 135 where the tone sandhi for '一' is not applied correctly when it appears in numerical sequences like '一百二十'. The fix involves modifying the condition at that line to handle this case. Check the surrounding logic for other tone modifications and ensure consistency. Test with various numerical phrases to verify the fix.