I currently use a Scarlett2i2 (3rd gen) ADC/DAC as a DAC output via USB. The Scarlett has the advantage that one can use the balanced output to directly drive a class D poweramp, in my case a DIY amp with Pascal S-Pro2 module (2x250W on 8 Ohm). The beauty of the Scarlett is that it’s ADC input is recognised by Volumio and I can connect the output of my phono preamp (Cambridge Duo MM/MC) to it. This way I have a minimal system consisting of record player (Rega P3) phono preamp, Scarlett interface and Raspberry Pi4 on which I am not only able to enjoy audio in digital format, be it Qobuz, flac files, web radio or even from CD (simple external CD/DVD burner connected via USB) but also from my extensive vinyl collection. The icing on thee cake would be a plugin allowing to ‘rip’ the analog input, similar to what Volumio already allows for CD playback.
I did the same as you with the Tascam 1x2HR.
It also works very well. Anyway the stream frequency/bit rate displayed on Volumio play screen is not the one advertised for the Tascam (Volumio display 48/32 whereas Tascam capability is 192/24).