earshot gives a coding agent ears
Leon Lin's earshot lets a coding agent hear, judge, and replace sound effects. Opus 5.5 could already build a launch video in code. The audio was the sloppy part.
Leon Lin had already shown that Opus 5.5 can build a launch video entirely in code. The leftover complaint was the sound effects: sloppy, because the agent could not hear them. earshot is the patch. Ears for a coding agent — hear a sound, judge it, make a better one.
Every sound in the video was made with code, which keeps the claim inside the same discipline as the picture. This is not a human dropping a library hit under a generated edit. The agent is in the audio file the way it was already in the frames.
It is a small organ to add, and it explains a whole class of bad AI video. The pictures got a critic. The speakers did not, until this.

Made with
Leon Lin
@LexnLin
Introducing earshot Opus 5.5 can build a whole launch video in code but still produces sloppy sfx. so we built earshot. it's ears for AI coding agents. they can now hear sounds, judge them and even make their own good sounds. every sound in this video was made with code. https://t.co/W2ODtk0JCe
2.7K likes
- likes
- 2,727
- replies
- 138
Captured when this was curated, not live. —