Placeholder sounds (Kenney CC0 packs, BigSoundBank CC0 floppy recordings, the OpenCode 2.0 startup recipes and synthesis) until ElevenLabs has credits. Click ▶ to play, again to stop. The ambience loops. Sounds with several options list them in order; option 1 is the manifest default and in use marks the take the arcade plays. Candidates from your OpenCode SFX library sit behind “Show more”.