Surface — Audio player

Summary

Full-screen audio playback for a Knowledge Card in audio-book format. Speed control, skip 15s, chapters, one-tap Ask AI mid-listen.

Raw wireframe

• .context/designs/mobile/knowledge/audio-player.html

Copy

• Header: "Now playing"
• Title (of the card)
• Narrator credit
• Position + remaining
• Controls: skip-back-track · rewind 15s · play/pause · fast-forward 15s · skip-forward-track
• Options: 0.75× / 1× / 1.25× / 1.5× / 2× speed · Chapters · Ask AI
• Partner-state pill: "Rahul finished this yesterday"

States

• Playing
• Paused
• Loading
• Chapters open (bottom sheet)

Related

• (entry from surface-mobile-knowledge-feed or surface-mobile-knowledge-card-detail)
• pillar-knowledge
• content-taxonomy

Sources

• pillar-knowledge
• 2026-07-27 UX simplification: audio-book format