Thank you, I finished the installation but every time I exit the terminal/ssh I lose the connection (external usb dac). I also set it to start automatically. I’m giving up for now and will continue to use Plexamp directly from Ipad via CCK (Camera Connection Kit), maybe in the future there will be an RPI OS with integrated Plexamp . For now, to me, it’s too complicated to find where the problem comes from.