How to Voice an Audio-Only Game

An audio-only game has no screen to fall back on. Where the player is, what just changed, whose turn it is, whether the door opened: all of it has to arrive as sound, and most of it has to arrive as a voice line. AudioProducer.ai can produce those lines. You cast a voice per character, tag each line by speaker, set an emotional tone on individual dialogue lines, place music and effects, and download the audio chapter by chapter as MP3. What we do not do is put the files into your engine. Plan for that before you generate anything, because the shape of the export decides how you organize the script.

What an audio-only game is, and who is playing it

The category covers text adventures that speak, audio horror and mystery games, navigation games where you find your way by listening, and interactive stories that run on headphones with the screen dark. Two audiences overlap in it. Blind and low-vision players have their own communities, their own review culture, and years of listening at speeds that would leave most people behind, so the bar for audio clarity is higher here than in a game where voice is decoration. Sighted players show up too, on a commute or in bed with the phone face down. Both groups notice immediately when a line is muddy or when two voices are too close to tell apart. If the accessibility side is your main interest, our notes on producing audio for visually impaired readers cover the listening habits in more detail.

With no screen, the narrator is your interface

In a normal game a HUD carries the state and the voice carries the story. Take the HUD away and one voice has to do both jobs. Your script then contains two kinds of line: story lines, and system lines that report a fact ("the north door is locked", "you are carrying three keys"). Keep the system lines short, and keep their phrasing identical every time they fire. Variety is a virtue in prose and a bug in an interface, because the player is learning your game by ear and every rewording costs them a beat of recognition.

In the editor, the practical move is to create a character for the system voice and tag every system line to it, the same way you would tag a narrator. Dialogue emotions are set per line, so you can leave the system voice flat and reserve the emotional tags for the story lines where inflection actually carries meaning.

Give the menu, the narrator, and the cast different voices

A player who cannot see the screen navigates by timbre. If the menu voice and the narrator sound alike, every menu turns into a guess. Browse and preview the library on the Voices page and pick your load-bearing voices as a set rather than one at a time, listening for distance between them in pitch, age, accent, and pace. Two well-cast voices from the same range will still collide once they are compressed into a phone speaker on a bus.

Character folders help when the cast grows, because you can keep system and menu voices in their own group instead of scrolling past them every time you tag a story line. If two voices turn out to sit too close together, our post on what to do when two characters sound too similar walks through the fixes, and choosing voices for characters covers casting a set from scratch.

State cues you have to place yourself

Auto-Assign Sounds reads your text and places music, soundscapes, and one-shot effects to match the scene, which is genuinely useful for the narrative stretches of an audio game. It cannot help you with state, because state is not in the prose. "The generator is failing" is a condition your engine knows about; nothing in the chapter text says it. Cues like that you place yourself in the Sounds panel, on their own line, so the cue can be exported as its own asset and triggered when the condition is true.

One real limit to design around: there is no per-cue volume slider and no fader in AudioProducer. You cannot pull a bed down under a line, so do not plan a mix that depends on it. Choose cues that already sit apart from your voices in pitch and length, and give a loud cue its own moment using an inline pause rather than firing it underneath speech. Sparse and legible beats layered and busy in a game where sound is the only channel you have.

One voice line is one chapter

This is the part worth knowing before you write the script. Our export unit is the chapter: one click renders a whole chapter to a single audio file, and each chapter downloads as its own file. There is no per-line export. So for a game, the working structure is to make each voice line, or each tight group of lines that always plays together, its own chapter, then download chapter by chapter.

Be honest with yourself about the cost: a 200 line script means 200 chapters and 200 downloads, and that is real work, not a formality. Two things make it survivable. Turn the chapter intro off in Edit Project first, or every exported file will announce its own chapter name before the line. And decide your naming scheme before you generate rather than after, which we cover in naming and organizing game voice line files. If you are still sizing the script, how many voice lines an indie game needs gives you a count to plan against.

The lines a player will hear a hundred times

Every audio-only game has a handful of lines that fire constantly: the movement confirmation, the inventory check, the error when a command does not parse. In a game with visuals, repetition hides behind everything else on screen. Here it is the whole experience, and the ear catches a repeat far faster than the eye does. Give your two or three highest-frequency lines a couple of alternate readings and leave the rare ones alone, which is the same economics as game barks generally. The approach carries over from voicing NPCs in an indie game, and the branching and trigger side is worked through in adding voices to a Twine interactive fiction game. The full guide index collects the other game-audio and voice-line walkthroughs.

After the download, everything is your own pipeline. We do not ship a Unity or Godot plugin, we have no API for voice lines, and we do not host or distribute anything. You get MP3 files and you wire them up. A reasonable first pass is one scene: a few characters, a system voice, and twenty lines as twenty chapters. Play it back with your eyes shut and you will learn more about your casting in ten minutes than from any amount of planning. The free tier gives you 1,200 words with no card to try that with, and paid plans start from $39.99 per month.