Can I get a definition on how we are using the word playback?
Normally a soundcard in a computer allows you to play music from some program out to speakers or line-out, etc. I call that
playback, and a stock UA-5 can do that, acting as an external soundcard to the computer via USB. When you do a digimod it breaks that capability in the UA-5. Most of us don't miss this functionality in the UA-5, we just use the soundcard in our computers.
When a UA-5 has the digi-mod done you can still record from the UA-5 to the computer via USB, so if you want to be the occasional laptop taper, you can still do that, or use a JB3, H120, MT, etc.