Warner Music Group's chief operating officer, Rob Wiesenthal, has left the company.

In fact, the exec is leaving the music business altogether, according to a memo obtained by Billboard. Warner CEO Steve Cooper writes that Wiesenthal will be focusing on his role of CEO at Blade, "the first crowdsourced short distance aviation company", which he set up while working at Sony.

Wiesenthal joined WMG in 2013, working on partnerships with the likes of Shazam and Clear Channel, as well as ...