Last updated 08-14-2026
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CassetteAi
CassetteAi is a real-time audio generation API for developers who need music, sound effects, or speech inside apps and games. Its models render a 30-second music sample in under 2 seconds and a full 3-minute track in under 10, at 44.1 kHz stereo. One SDK covers all three modalities through the same call shape.
Cloud audio APIs usually add round-trip latency that breaks interactive experiences. CassetteAi targets on-device inference with sub-50 millisecond time-to-first-audio and pay-per-second billing instead of monthly seats. The homepage cites 23 ms first-sample latency and deterministic seeds so game loops can re-roll SFX per frame without drift.
Music costs $0.02 per output minute and SFX costs $0.01 per generation, with no tier commitments. You call the models through fal.ai using JavaScript, Python, or cURL. Text-to-speech with zero-shot voice cloning is listed as launching soon.
Game studios, creator tools, and real-time media pipelines are the stated audience. Pixl Technologies runs the company from Salt Lake City, with engineering spread across North America and Europe.
30-second music sample renders in under 2 seconds at 44.1 kHz stereo
SFX generator produces up to 30 seconds of sound in roughly 1 second
Music pricing is $0.02 per output minute with 10 to 180 second durations
SFX pricing is a flat $0.01 per generation with loop-safe outputs
300M parameter music model with deterministic seeds for reproducible tracks
Same fal.subscribe() call shape for music, SFX, and upcoming TTS models
Sub-2-second previews make music iteration practical in live apps
Pay-per-second billing avoids monthly seat commitments
One API shape covers music, SFX, and upcoming TTS models
Deterministic seeds let games re-roll SFX without unpredictable drift
Live playground on the homepage requires no signup to test clips
TTS modality is not live yet, only music and SFX APIs ship today
API access routes through fal.ai, adding a third-party dependency
On-device licensing requires a separate enterprise conversation
Usage pricing can add up quickly on long 3-minute music tracks
How fast is CassetteAi generation?
CassetteAi returns a 30-second music sample in under 2 seconds and a full 3-minute track in under 10 seconds. SFX up to 30 seconds renders in roughly 1 second. Output is 44.1 kHz stereo with no drops listed on the contact FAQ.
How much does CassetteAi cost?
CassetteAi charges $0.02 per output minute for music and $0.01 per SFX generation. There are no monthly tiers or per-seat fees on the pricing page. You pay only for the seconds of audio the API returns.
How do I call the CassetteAi API?
CassetteAi exposes models through fal.ai. You use fal.subscribe() with CassetteAI/music-generator or cassetteai/sound-effects-generator from JavaScript, Python, or cURL. The same input shape works across modalities.
What audio formats does CassetteAi output?
CassetteAi outputs 44.1 kHz stereo WAV files at 16-bit depth. The homepage describes CD-grade reference quality at 44,100 samples per second, suitable for DAW workflows and game engines.
Is CassetteAi TTS available?
CassetteAi lists text-to-speech as launching soon with zero-shot cloning from a 10-second sample and emotion tags. You can join the TTS waitlist through the CassetteAi site while music and SFX APIs are live.
Who founded CassetteAi?
CassetteAi was started by Akhil Tolani under Pixl Technologies in Salt Lake City in late 2023. The about page notes an O'Shaughnessy Ventures fellowship in 2024 and an SFX API launch in 2025.