Procedural Drawing Sound (Chalk / Marker / Pencil) Problem: Whiteboard animations feel unnaturally silent during drawing, and manually syncing sound effects is impractical. Proposed Solution: An optional procedural “draw sound” layer that automatically plays while the hand is drawing and pauses when it stops. • Toggle on/off • Volume control • Sound types: chalk, marker, pencil, dry-erase User Value: Instant realism, improved viewer engagement, zero setup time. Business Opportunity: Low development effort, high perceived polish. Ideal as a one-time or bundled upsell.