New partnership: Mirelo SFX launched on fal.ai

AI video generation has been moving at light speed. The visuals are stunning — but there is something missing.

Sound.

Most AI video providers generate videos without sound. No matter how cinematic, a visual without sound feels unfinished. That changes today. Meet Mirelo SFX, the first sound effects model designed specifically for AI-generated video.

Available now on fal.ai.

Sound generated by Mirelo SFX.

The Model That Unmutes AI Videos

Before, adding sounds to AI videos was a tedious process. Now, Mirelo SFX lets you easily create perfectly synced cinematic sound with one click.

• The video is the prompt — Just pass in a video. No text descriptions, no extra setup. Mirelo SFX generates perfectly timed sound directly from the visuals.
• High sound quality — We focus on production-ready cinematic sound.
• Pure effects, no noise — Forget the leakage of unwanted background music or speech. You get clean, contextual sound effects only.
• Optimized for synthetic video content — Mirelo SFX thrives where others stumble.

Typically, AI-generated videos don't come with sound. Mirelo SFX unmutes them with one click.

Built for production pipelines

By integrating Mirelo SFX through fal.ai, video-gen platforms can now deliver complete experiences by default:

Real-time generation — 10 seconds of video = 10 seconds of compute.

Multiple variations — 2-8 outputs per clip so users can pick their favorite.

Mirelo SFX is the new world's best video-to-sfx model

The uncanny valley is finally crossed. In listening tests, users preferred Mirelo SFX's output 67-77% of the time. This isn't a nice-to-have anymore — it's a model that can be chained by default, knowing it will enhance every video, not degrade it.

Comparison study

In blind pairwise comparison tests, independent raters* compared generations from Mirelo SFX and three of the most popular existing video-to-sfx alternatives (PixVerse, MMAudio V2 and ThinkSound). In average, Mirelo SFX achieved a total win rate of 67.4% (excluding ties) and 77% (including ties), clearly outperforming all three alternatives.

Side-by-side examples

Competitors often struggle with unwanted artifacts like music or speech, particularly on synthetic videos (see, e.g., examples 1 and 2 below). Mirelo SFX also excels at creating realistic effects across a multitude of scenes when alternative models default to unrelated or unnatural sounds (see examples 2 and 3 below).

Try it yourself!

Try it live in the fal.ai playground

Try it within the Mirelo Studio

Learn more about Mirelo SFX

What's next?

We are constantly pushing updates to our models and ship new products — so stay tuned. Follow us on social media to never miss new updates: Linkedin, X, Instagram, TikTok.

* We recruited 20 external listeners from a crowd-sourcing platform via mabyduck. The raters were pre-screened by mabyduck to ensure they listen closely to the given audio. Raters performed pairwise comparisons between different audio generations for a given video, with the option to vote for a "tie". 740 pairwise comparisons were collected in total.