How to Create a Two-Voice Dialogue with AI, Mixed into One File

01What an AI dialogue with two voices actually involves

The old way to build a two-voice conversation: generate every line separately, download twenty files, drop them onto a timeline, nudge the gaps and try to level the voices so one isn't louder than the other. An hour of fiddling for a one-minute exchange.

Vocla's Text to dialogue collapses that. You write the whole conversation in one place, cast a voice per speaker and set how each line is delivered. Vocla voices every line in its speaker's voice, trims and levels each take, and lays them on one timeline with the pauses you chose. The player highlights each line as it plays, so you can spot what needs a tweak.

Dialogue is a mode of text to speech, so it uses the same voices, pronunciation dictionary, number reading and credits. A name you taught Vocla to pronounce is said the same way in every line.

02The script format: Name, colon, line

One line per turn, starting with the speaker's name, a colon, then what they say. Paste a whole script and every speaker is detected. A line with no name continues the previous speaker.

There are two ways to add a delivery style: in parentheses after the name, like (calm), or in square brackets before the text, like [excited]. Seven styles are available, set line by line:

Limits are generous: up to 200 lines per script and 2,000 characters per line. To skip the blank page, start from one of four templates in Arabic and English: podcast intro, radio ad, customer call and interview.

03A skit-style ad script

Conversational ads work because they sound like a real moment: one person has a problem, the other has the fix. A Saudi radio or audio spot for a fictional mobile car wash, with an announcer closing on the offer:

Three things make it work. The lines are short and each reply answers the one before. Styles appear on only three lines: the problem, the fix and the decision. And the announcer is a third, distinct voice, so listeners know where the official offer starts.

Both mean “Want your car washed without leaving home?” In a skit, the Saudi line is the one a friend would actually say.

04Role plays for e-learning and customer-service training

Role plays are one of the strongest teaching tools, but recording them with actors is expensive and every change means another session. With generated dialogue you edit a line and regenerate. An MSA role play for a workplace-skills course with learners of many nationalities:

For contact-centre onboarding, a sample call lets new agents hear the right tone before their first real customer. An Egyptian call with an upset customer whose order is late:

These calls are easy to keep current. When the returns policy or the apology wording changes, edit one line and regenerate with the same voices. If you're building a training library, name files by scenario, such as late-order.mp3 and product-return.mp3.

05Pairing voices and dialects

The golden rule: listeners must know who's speaking without thinking about it. Cast clearly contrasting voices, such as a female and a male voice, or two voices of different ages. If your workspace has brand voices, they're listed first when you cast, so every production keeps the same sound.

Mixing dialects in one dialogue is fine, even useful, when it's deliberate: a Saudi traveller chatting with a Lebanese local in an airline spot, say. Accidental mixing, a character who starts Saudi and drifts into MSA, breaks the illusion. Write each character in their dialect's words and cast a voice from that dialect.

06Timing: pauses, gaps and quick replies

A conversation lives in its rhythm. The same words feel dull when slow and flustered when rushed. Vocla gives you three timing controls:

Give quick reactions their own line instead of burying them in a long one. With quick-reply overlap on, a standalone “Really?” lands a fraction sooner and the exchange feels alive. Each line is voiced separately and then mixed, so speakers never talk over each other beyond that short overlap.

• Ads: short gap, one pause just before the offer line.
• Training: default gap, a one-second pause after questions that need thought.
• Podcasts: a calmer rhythm; the details are in our AI podcast guide.

07Generate, export and what it costs

1. 1Add names to the pronunciation dictionary: character and brand names, before you generate, so every line says them the same way.
2. 2Generate and listen along: the player highlights each line, so rhythm problems are easy to find.
3. 3Fix the line, not the scene: rewording one line or changing its style beats rewriting the dialogue.
4. 4Download: one mixed MP3 or WAV file, saved to your Library.

Pricing works exactly like text to speech: credits come from the characters in all lines and the rate of the model you pick, shown before you generate and refunded if a generation fails. For scale, the demo dialogue on the product page was 233 characters and used 280 credits. A roughly 30-second skit ad of about 500 characters needs around 600 credits on the top-quality model, and Starter at $4.99 includes 5,000 credits with commercial rights.

If the dialogue is one piece of a larger production with scripts, voice, video and exports, our workflow guide puts the steps in order from idea to final file.

Business names in these scripts (Lamaa and others) are fictional examples and don't refer to real organisations.