Producing a multi-voice audiobook version of a chapter or excerpt involves more coordination than a single scene — consistency across a longer stretch of narration, a clear division between narrator and character voices, and enough attention to formatting that the system doesn't lose track of who's speaking across several pages. Here's a practical process for doing this well.
Step 1: Separate narration from dialogue clearly
Most fiction mixes narrative prose with dialogue in the same paragraph. Before converting a chapter, go through and clearly separate the two: narration on its own, and each character's dialogue attributed to their name on its own line. This is the single biggest factor in getting clean, reliable output for longer passages.
Step 2: Assign a consistent narrator voice
Pick one voice to handle all narrative prose throughout the excerpt, and keep it distinct in tone from any of your speaking characters — this mirrors how professional full-cast audiobooks are structured, and helps listeners immediately distinguish "the story is being described" from "a character is speaking."
Step 3: Review character voices for consistency across the excerpt
If a character appears across multiple scenes within the same chapter, confirm the same voice is assigned each time. This matters more in longer excerpts than in a single short scene, where a mismatch is more likely to go unnoticed.
Step 4: Break long chapters into manageable sections
Rather than converting an entire chapter in one pass, consider breaking it into scene-length sections. This makes review faster — if something needs fixing, you're not regenerating and re-listening to twenty minutes of audio to catch one issue — and makes it easier to spot inconsistencies early.
Step 5: Listen for narrator/dialogue balance
The final thing worth checking specifically for audiobook-style content: does the narrator voice ever accidentally take over a line that should belong to a character, or vice versa? This is the most common issue in longer, denser passages, and it's usually a formatting fix — making sure the character attribution is unambiguous — rather than a voice-casting issue.