Hi!
There are many wireless (bluetooth or wifi) print-servers on the market. But you need to examine tech-specs and user manuals to be sure that your printer will work with them.
Hi-fi audio… maybe compatible usb fm transmitter will fit?
And about network usb hubs - i know that USB/IP Project exist. Maybe this will help to solve?
With best regards.
Just another variant
lowcost and noiseless nettop with attached printer and usb soundcard.
Nettop will work as print-server and play sound from laptop through pulseaudio. Laptop will be linked to nettop through wifi.