Are you aiming to play everything at native sample rate, up to the maximum the DAC supports, or to convert everything to the highest sample rate? The former is easy - go to the 'Squeezelite Settings' tab and make sure the 'Output setting' is using one starting 'hw:' as suggested when you click 'more>' next to it. You can click on one in the list rather than typing it in. The latter is a bit more involved - see the 'Upsampling setting' entry in the squeezelite settings. You'll want to refer to the squeezelite man page resampling section, and possibly to the sox documentation, to understand the options available.At the PC I can adjust the USB to transmit up to 384khz. Is this somehow also possible/needed with the Raspi? I am using Picoreplayer and Raspi 3B V1.2.