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Make Characters Speak: Dialogue Voice Synthesis

Noveble’s Dialogue Voice feature automatically detects dialogue in a chapter, assigns a consistent voice to each character, and supports line-by-line playback and regeneration.

•
12 min read
•by @sukitly

When reading a dialogue-heavy chapter, there’s a small annoyance: your eyes read the words, while your brain keeps switching—"Who’s speaking now?" It’s especially noticeable when multiple characters are on the same page, and a moment of distraction sends you scrolling back to find the previous line.

Noveble’s Dialogue Voice feature helps with that: it automatically detects dialogue in the chapter, assigns a voice to each character, and plays it with a click.

Dialogue Detection

"Just read what’s inside the quotes" sounds simple, but there are real challenges:

  • Many quote styles: Chinese uses " ", Japanese uses 「 」, and some authors mix them
  • Not every quote is dialogue: inner monologue, citations, and book titles can all be quoted
  • Speakers are often omitted: authors don’t write "X said" for every line, so we have to infer from context

Noveble uses a rule-based extraction + AI judgement approach:

  1. First, rules slice out candidate segments to keep positions accurate
  2. Then AI decides which segments are real dialogue, who’s speaking, and what tone to use

This keeps dialogue positions precise while filtering out non-dialogue content correctly.

Character Voice Matching

To make different characters easy to tell apart, Noveble references each character profile (gender, age, personality, etc.) and assigns a stable voice for each character. When the same character appears in other chapters, the voice stays consistent.

For every line, AI also generates performance cues—pace, emotional intensity, pause points—so the voice sounds more natural.

If you don’t like a line, you can regenerate that single line, with up to 3 versions to choose from.

Interactive Demo

Click the "Dialogue Voice" button in the toolbar below to try dialogue detection and voice playback:

Demo Chapter

The neon lights bled into blurry halos through the rain. Lin Yuan pushed open the bar door, its metal hinges screaming in protest. The bartender behind the counter looked up, red light flickering in his mechanical eye: "Back again? Third time this month." Lin Yuan didn't answer, walking straight to the corner booth. A figure in a black hood was already waiting there. "Did you bring it?" A hoarse voice emerged from under the hood. Lin Yuan slid a chip across the table: "Here's what you wanted. Five million neurons worth of memory backup." The hooded figure reached out with a hand covered in circuit patterns, examining the chip against the light: "Good. This should be enough for me to remember who I am."
This is a demo component to showcase the dialogue voice generation interface. The actual function will call AI to generate voice in real-time.

How to Use

On the chapter reading page:

  1. Generate voice: click "Dialogue Voice" and let AI detect and generate automatically
  2. Play: each dialogue segment has a play button
  3. Regenerate: retry a single line if needed, up to 3 versions per line
  4. Turn off: click the button again to return to pure text mode

Visit Noveble to experience Dialogue Voice Synthesis.