Mirelo, an audio company that lets anyone generate perfectly synchronised sound effects for videos, has raised a $41 million seed round, co-led by Index Ventures and Andreessen Horowitz, with participation from Atlantic.vc and TriplePoint Capital. The company was founded by two senior AI researchers who are also accomplished musicians, and who left big tech to build breakthrough foundation models in audio – one of the most emotionally resonant but technically underdeveloped areas of AI. The funding is a sign of a broader shift in creative expression, as AI tools empower more and more artists and designers to bring their ideas to life.