Santa Monica-based social media app startup Mayk.it has raised $4M in a seed funding, and launched its social music app, the company said this morning. The funding came from Greycroft, Chicago Ventures, Slow Ventures, firstminute, plus angel ivnestors Steven Galanis, Randi Zuckerberg, Mr. Beasts' Night media, Sophia Bendz (Spotify), Cyan Banister, T-Pain and Zach Katz, plus others. The company is led by Stefan Heinrich Henriquez, who is the former Head of Global Marketing at TikTok and Chief Marketing Officer at Cameo. Maykit's social media app is currently by invite only with a waiting list. The app allows people to produce and share music using their smartphone.