Make a Session-Zero Campaign Trailer With AI Voices

You are about to pitch a new campaign, and the hardest part is getting a table of players to feel the world before session one. A short audio trailer does that: the villain's voice, the narrator setting the stakes, a little sound under it all. You can build one from the notes you already wrote for session zero, with a real voice for every character, and send it to the group chat instead of another wall of text. Here is how to take a campaign pitch from session-zero notes to a finished trailer.

What a session-zero trailer is, and why audio sells it

A campaign trailer is a short piece, usually a minute or two, that previews the tone, the setting, and the central conflict of the campaign you want to run. It is not a full session recording and not a rules explainer. Its one job is to make prospective players want in. Audio does this better than a text pitch because tone lives in a voice: a weary narrator, a smug antagonist, a frightened NPC messenger all land in a way a paragraph cannot. If you have ever opened a session with a bit of read-aloud flavor text, this is that moment, cast and scored.

Writing the trailer script from your session-zero notes

A trailer is built from a written script, so the first job is turning your pitch into text someone could read aloud. You almost certainly have the raw material already: the setting primer you wrote for session zero, the campaign premise, the hook that opens session one, the lines you imagined your big villain saying. Pull those into a short script, narration plus dialogue, and tag who speaks on each line (Narrator, the Queen, the dying messenger).

Keep it tight. A trailer is not the first session, so pick three or four beats: a line that establishes the world, the inciting threat, one or two character voices that hint at what the party will deal with, and a closing line that asks the player to show up. If you are new to writing for audio, our guide on how to make an audio drama with AI walks through the same script-first approach from the top. A trailer voiceover is its own short form: our guide on how to make a game trailer voiceover with AI covers the same craft of a line that has to read on its own with no scene around it.

Casting the narrator and your NPCs as distinct voices

The thing that turns a trailer from a reading into a preview is giving each voice its own character. AudioProducer.ai assigns a separate voice to each speaking part, distinct from the narrator, so the Queen does not sound like the messenger and neither sounds like your scene-setting narration. Tag the speakers in your script, run Auto-Assign Characters, then swap any voice that does not fit until the villain sounds like your villain. For a recruiting trailer, contrast matters more than realism: a calm narrator against a sharp antagonist reads instantly as stakes.

Adding sound to set the scene

A campaign lives in its places, so a little sound goes a long way in a trailer. Rain and a distant bell under the opening line, the low rumble of a threat, a sword drawn on the final beat. Auto-Assign Sounds suggests cues from the script, and you tune them so the ambience supports the voices rather than burying them. You are not building a soundscape for a whole session here, just enough texture to make the world feel real for ninety seconds. A music bed is the other half of that texture; the ducking-under-voices approach from adding background music to an audiobook keeps a trailer's score from swamping the narration.

Keeping it short and getting it to your players

Render the trailer and listen once as a player would: does it make you want to roll a character? If a beat drags, cut it, a trailer is better at a minute than at three. Export the finished piece as a single MP3 and drop it in your group chat, your Discord, or a recruiting post for the game. The point is low friction: a short file someone can tap and hear is a far easier yes than a page of lore.

What this does not do

AudioProducer.ai handles the audio side only: clean script or notes in, cast the narrator and per-character voices, add sound, render, and download an MP3. It does not run dice, oracles, or any game engine, it does not connect to a virtual tabletop, and it does not host or distribute the trailer or run a recruiting board for you, so sharing the file is on you. You keep the rights to your campaign and the trailer you make from it. This is not legal advice.

How AudioProducer.ai fits

AudioProducer.ai turns written work into finished multi-voice audio in a web editor. For a campaign trailer that means: paste or import your short script, run Auto-Assign Characters and Auto-Assign Sounds, swap voices and tune cues until the preview feels right, then generate and download the trailer. The free account gives you 1,200 words a month with no credit card needed, which is more than enough to script a trailer and hear your villain before you commit to a longer run. The full guide index lists the other multi-voice audio drama guides.

Related reading

• Turn Your Tabletop / D&D Campaign into an Audio Drama: once the campaign is running, turn whole sessions into episodes.
• Turn a One-Shot or Module Into an Audio Drama: adapt a self-contained adventure start to finish.
• How to Make an Actual Play Podcast With AI Voices: take recorded play into a scripted actual-play feed.
• Turn Your TTRPG Sourcebook Into Audio With AI: narrate read-aloud boxes and region writeups.
• How to Turn an AI Dungeon Adventure Into Audio: adapt a solo AI-driven adventure into audio.
• How to Turn a Solo Journaling RPG Playthrough Into Audio: give a solo journal a narrator and in-world voices.
• Turn Your D&D Campaign Into a Comic: adapt the campaign the trailer teases into a comic.