I really have no need for 7.1 sound. It just so happens that the sound card supports it. The maximum volume was quite low so I thought that the card was not configured properly. In the meantime, I wanted to compare the sound to that put out by the raspberry pi audio. I set enable audio in the raspberry pi settings, but no sound. I removed this setting and this resulted in a boot loop. In any case, can you recommend an inexpensive sound card which would be supported by max2play?