How as an x box player with ps4 players talk about Fortnite?

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Moin, I'm an x box one player and wanted to talk to my friends about the Fortnite sound, so that we're in a group, but it doesn't work, do I have to change something for myself? My two colleagues (Ps 4 players) hear each other

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I don't know if the setting still exists but you have to set crossplay talking on or something.