In the last four years, WMG has invested in gaming platform Roblox, digital fashion retailer DRESSX and music generator Lifescore, which is powered by artificial intelligence (AI). Sony ­Music Entertainment has backed another music creation (and collaboration) platform, Tully; social platform Fave; and Techstars Music, an accelerator program that provided funding and mentorship to promising music technology startups. (It was quietly shuttered after this summer’s class, according to managing director Bob Moczydlowsky.)