CassetteAI

What it does

CassetteAI is a generative audio platform with three models: music, sound effects, and text to speech. The music model makes 1 to 4 minute tracks at 44.1 kHz stereo, the SFX model makes loopable clips up to 30 seconds, and the TTS model is launching soon. Developers call the models through one API shape with a single fal.subscribe() call.

CassetteAI is built for developers who need audio generated inside an app, not just in a browser. The homepage shows one API shape for music, SFX, and TTS, so you can swap model IDs without rewriting calls. Music runs from 10 to 180 seconds per call, SFX from 1 to 30 seconds, and the page states a 30-second music sample renders in under 2 seconds and a full 3-minute track in under 10 seconds. Pricing is metered per second: $0.02 per output minute for music and $0.01 per SFX generation, with no tiers or seats. The TTS model is marked as launching soon, so its launch pricing is still to be determined. The homepage also says the playground needs no signup, but it does not state whether an API key requires an account. There is no free plan mentioned, and the page does not say whether the software is open source.