2020 mbp, using safari. Hopefully this is the right place. Currently using air play to cast to my tv using it as a separate display. Works great but is it possible to have my mbp's audio split so that what im seeing on my mbp screen is coming though my laptop speakers and what's streaming on the tv comes through the tv? would like to watch multiple sporting events at the same time with the sound split. Currently sound just comes through tv. Thank you!