> I wonder if this problem could be "solved" by having some kind of "dual mode" DACs that can accept two streams of audio at different sample rates, likely 44.1

> I wonder if this problem could be "solved" by having some kind of "dual mode" DACs that can accept two streams of audio at different sample rates, likely 44.1khz and 48khz, which are converted to analog in parallel and then mixed back together at the analog output. You'd just resample both at 192kHz and run it into 192kHz DAC. The "headroom" means you don't need to use the very CPU intensive "perfect" resample.