GPT-6 Astra/Sol designed the SFX here
Opus 5.5 can do it, too
I uploaded my muted video into Codex & asked the agent to edit the audio for it. Watch the result.
I built this sound-design pack without DAW or 3rd party samples - just with my brain + AI agent.
Here's your SFX pack prompt (save it):
[Build an original SFX palette for my short visual edit in Codex, without a DAW or third-party samples. First map the visual events by function: micro-cut, object lock, texture movement, transition, resolve. Start with only three distinct dry mechanical-digital sounds, not a full pack. Avoid tonal beeps, pitch-sweep lasers, bells, conventional drums and long reverb. Export individual 48 kHz / 24-bit WAVs, a level-matched audition reel and a cue sheet. Check peaks, clean endings and mono compatibility. Don’t claim you can hear the result: ask me which prototype works, which fails and why; iterate from that feedback before making variations.]
Art, video & music
Sound design for a muted video, made by a coding agent without a DAW
A silent edit went into Codex and the agent designed original sound effects to fit it, with no DAW and no third-party samples. GPT-6 Astra/Sol did the work, and the prompt for building the sound pack is shared.
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- Made with
- Codex, GPT-6 Astra, GPT-6 Sol
- Role
- Designer, ex-Warner Music, PepsiCo and Spotify
- Posted








