PE (I've used it only for listening, not recording) takes a while to 'sink in' (pun intended). At least some of the PE preset settings still function when it's 'closed'. In ?Ubuntu it'll minimize with the panel icon visible (if you've include it there). Some options can't be enabled without installing 'lsp-plugins'. 'pavucontrol' is essential to see the goz-intas/outas.