for a project,
i'm working with 192 khz, but unfortunately, none of my
audio interfaces (rme multiface and fireface ucx) support 192khz. the
ucx supports 192khz in hardware, but the usb/alsa/class-compliant mode
only seems to go up to 96khz. so i wonder, is there any way to perform
upsampling within jack?
You could run Jack with the dummy backend and use zita-a2j and/or j2a
to add your HW interface.