Mirelo SFX 2.0 vs ElevenLabs Sound Effects v2: Which SFX API

Pick Mirelo SFX 2.0 when you want an uncompressed WAV that goes straight into an edit timeline or a game engine. Pick ElevenLabs Sound Effects v2 when you need very short UI cues and a lower rate per second.

Both models are live on HiAPI. Open Mirelo SFX 2.0 for one 1–30 second WAV from a written description, or open ElevenLabs Sound Effects v2 for an MP3 from a description plus a length. New accounts get 200 credits on sign-up.

The differences at a glance

The split runs deeper than price. Mirelo SFX 2.0 hands back a whole-second mono WAV and puts all the control in the description; ElevenLabs Sound Effects v2 hands back a stereo MP3 and takes the length as a plain number of seconds.

One description, one run on each

The description is the rainy metal roof, submitted once per model, with 5 seconds requested on both:

Heavy rain at night on a corrugated metal roof, dense overlapping droplets, distant rolling thunder, water running into a gutter, close-to-mid perspective, steady ambience with no music and no voices.

The same description, generated once on each.

Use this prompt → The link fills the description only; set duration to 5 seconds after it opens, and set 5 seconds on the ElevenLabs side too.

The audible difference is concrete: the Mirelo take is an uncompressed mono WAV and the ElevenLabs take is a lossy stereo MP3, and the same description produces different rain density and a different thunder placement on the two. Listen to both on headphones; pick by the format your downstream needs.

Which one for which job

• Film foley headed into a mix session → Mirelo SFX 2.0, which ships a 48 kHz WAV and skips one lossy step.
• Impacts, footsteps and mechanisms in a game engine → Mirelo SFX 2.0, where whole-second lengths line up with event lengths.
• Short, punchy UI cues → ElevenLabs Sound Effects v2 at $0.0029 per second, so a long audition pass stays small.
• A full 10–30 second ambience bed → Mirelo SFX 2.0, where "steady ambience" in the description returns the whole stretch in one request.
• A long sound spec that has to be reviewed word by word → Mirelo SFX 2.0, with 2,000 characters to write it in.
• One MP3 straight into a timeline → ElevenLabs Sound Effects v2, with no transcoding step.

What does switching cost?

Very little. Both models run on POST https://api.hiapi.ai/v1/tasks with the same API key, and both return results through GET https://api.hiapi.ai/v1/tasks/{taskId}. Two things change:

• model: mirelo-sfx-2.0 or elevenlabs/sound-effects-v2.
• input: the length field has a different name. Mirelo SFX 2.0 uses duration in whole seconds from 1 to 30; ElevenLabs Sound Effects v2 uses duration_seconds.

A pipeline already sending duration_seconds only needs to round it to a whole number and rename the key. Going the other way, send the requested seconds in duration_seconds.

FAQ

Can Mirelo SFX 2.0 produce anything shorter than a second? No. Its shortest clip is 1 second. For shorter accents, use ElevenLabs Sound Effects v2.

Does ElevenLabs Sound Effects v2 return WAV? It returns a fixed MP3 at 44.1 kHz, 128 kbps, stereo. For a lossless WAV, use Mirelo SFX 2.0.

Can I reuse a description on both? Yes. Mirelo SFX 2.0 gives you 2,000 characters, so trim the text to the limit on the ElevenLabs side and keep the source, material and action.

What does a 5-second clip cost on each? $0.1075 on Mirelo SFX 2.0 and $0.0145 on ElevenLabs Sound Effects v2.

Run one of each

Take the rain description above, run 5 seconds on Mirelo SFX 2.0 for $0.1075, then run the same 5 seconds on ElevenLabs Sound Effects v2 for $0.0145, and play them back to back before you pick the format your pipeline wants.

Related: Mirelo SFX 2.0 pricing · four real sound-effect prompts · the 5-minute API guide