Charles Hudson

Apologies for asking a simple questions but I am lost after new install of Fedora KDE. The machine is a dual-boot ASUS / AMD and has on-board audio, as well as a Xonar DG card and a Hauppage TV tuner. ALSA has arbitrarily selected front-panel headphones for sound output. I would like to change this to use the Xonar card's stereo line out, as is configured in the Win10 applications. This output goes to an amp and speakers. ALSA Mixer doesn't even show this as an option. What am I missing? Thanks for...