Thank you for your prompt reply. The only writing on the card is „7.1 channel sound“. The accompanying paper card in the package states that no drivers are necessary. The manufacturer’s name is not mentioned anywhere. I discovered it when using the lsusb command: Generalplus Technology Inc. I just installed the usb sound card driver from the Raspberry settings and rebooted. This had no effect. the same errors appear as before when choosing option surround71 for the squeezelite sound card.