How long can the tracks be?

1 to 30 seconds. You choose the length before you press go, and the price follows it.

How is it different from CassetteAI Music?

CassetteAI Sound Effects: Sound effects up to 30 seconds long, in about a second. CassetteAI Music: Royalty-free music in seconds, from a prompt. They all run in the same studio, so you can try one prompt on each.

How much does a run cost?

A sound effect costs $0.0135. You see the exact price before you press go, and a run that fails costs nothing.

Is CassetteAI Sound Effects free to try?

No. There is no free credit: you add credit from $5, and your first top-up has no card fee. The cheapest run is $0.0135 (a sound effect), so $5 covers 370 of those. You pay per run, in dollars, with no subscription.

Can I use what I make commercially?

Yes. You own what you make on Leap, so you can use it commercially, and we never train AI on it. The people and brands shown in a result can still have rights in it; the Terms say more.

Yes. Leap's REST API runs it as cassetteai/sound-effects, at the same price per run as the studio, and agents can call it through Leap's MCP server. The request is at the bottom of this page.

Do I need a CassetteAI account?

No. Leap sends your request to CassetteAI's model and gives you what it makes. One Leap account runs CassetteAI Sound Effects and every other model, in the studio, through the API and from your agents.

CassetteAI Sound EffectsAI sound effects generator

Sound effects up to 30 seconds long, in about a second. On Leap, it sits beside 174 other models in one studio.

Sound effects
Up to 30 s

No subscription
Every top model, one account
Pay per run, priced before it starts

Listen / A bank vault door unlocking

0 / 10 s

AI sound effects generator

CassetteAI Sound Effects at a glance

CassetteAI Sound Effects is a sound effects model from CassetteAI. It makes sound effects from words, 1 to 30 seconds long.

Made by: CassetteAI
Makes: Sound effects
Starts from: Words
Length: 1 to 30 seconds
Prompt: Up to 4,000 characters
Price per run: $0.0135
Updated: October 3, 2026

01Write the words, pick a voice
02See the exact price, then press go
03Keep it in your library, or take it further

Pick the right one

CassetteAI Sound Effects and its siblings

Model	Best for	Length	Price per run
CassetteAI Sound Effects (this page)	Sound effects up to 30 seconds long, in about a second.	1 to 30 seconds	$0.0135
CassetteAI Music	Royalty-free music in seconds, from a prompt.	30, 60, 120 or 180 seconds	$0.027 to $0.081

Start with an idea

Three ways to try CassetteAI Sound Effects

Side by side

More voice and sound models on Leap

Why Leap

Why creators make it on Leap

01
Every top model, side by side
175 models from Black Forest Labs, Google, ByteDance, Kuaishou, Alibaba and more, side by side in one studio.
See the models
02
One click, or full control
Character Studio, effects and recipes write the prompt for you. Or write your own for any model.
See the tools
03
Your work stays yours
Everything you make stays in your library while your account is active, and you own what you make here.
See what people make
04
One balance for everything
The studio, the API and your agents spend the same balance, and every run shows its price before it starts.
How pricing works

Questions

CassetteAI Sound Effects, answered

What is CassetteAI Sound Effects?: CassetteAI Sound Effects is a sound effects model from CassetteAI. Sound effects up to 30 seconds long, in about a second. On Leap it runs in one studio beside every other top model, with one account.
How long can the tracks be?: 1 to 30 seconds. You choose the length before you press go, and the price follows it.
How is it different from CassetteAI Music?: CassetteAI Sound Effects: Sound effects up to 30 seconds long, in about a second. CassetteAI Music: Royalty-free music in seconds, from a prompt. They all run in the same studio, so you can try one prompt on each.
How much does a run cost?: A sound effect costs $0.0135. You see the exact price before you press go, and a run that fails costs nothing.
Is CassetteAI Sound Effects free to try?: No. There is no free credit: you add credit from $5, and your first top-up has no card fee. The cheapest run is $0.0135 (a sound effect), so $5 covers 370 of those. You pay per run, in dollars, with no subscription.
Can I use what I make commercially?: Yes. You own what you make on Leap, so you can use it commercially, and we never train AI on it. The people and brands shown in a result can still have rights in it; the Terms say more.
Is there an API?: Yes. Leap's REST API runs it as cassetteai/sound-effects, at the same price per run as the studio, and agents can call it through Leap's MCP server. The request is at the bottom of this page.
Do I need a CassetteAI account?: No. Leap sends your request to CassetteAI's model and gives you what it makes. One Leap account runs CassetteAI Sound Effects and every other model, in the studio, through the API and from your agents.

Your idea, CassetteAI Sound Effects.

Every run shows its price before it starts, and one that fails costs nothing.

Make it with CassetteAI Sound Effects

For developers

Run CassetteAI Sound Effects from code

API docs

Model ID: cassetteai/sound-effects
Makes: Voice and sound
Pricing: Per run, quoted first: POST /v1/quotes

Inputs

What the model takes. Leave out anything with a default.

Promptprompt

Text, up to 4,000 characters, required

Durationduration

1 to 30, required. Default: 10 s

The request

The same envelope for every model; only the model and its input change. With prefer: wait=60 the answer holds the result when the run finishes within a minute; a longer one is read again by its ID. Agents can call it through the MCP server at app.tryleap.ai/api/mcp.

curl https://api.tryleap.ai/v1/generations \  -H "x-api-key: $LEAP_API_KEY" \  -H "content-type: application/json" \  -H "prefer: wait=60" \  -d '{    "model": "cassetteai/sound-effects",    "input": {      "prompt": "A paper boat drifting down a rainy street at dusk"    }  }' # Video often outlasts the wait and answers "queued" or "running".# Put its "id" in GENERATION_ID and read it again until it is done:# curl https://api.tryleap.ai/v1/generations/$GENERATION_ID -H "x-api-key: $LEAP_API_KEY"