> /etc/modprobe.d/alsa-base.conf file from the running US12 environment to
> my system partition, rebooted, and QJackCtl starts jack with no problems
> and Yoshimi is currently making lovely sounds through the Audiophile.
> The only audio devices that appear are the Audiophile (card 0) and HDMI
> (card 1).
>


Maybe paste your current, working contents of /etc/modprobe.d/alsa-base.conf here so if anybody else is having a similar problem they can see what worked for you :)

Dale.