In most of these 'Hi-res' disputes I haven't gotten that far because I don't need to. If all available science and theory demonstrates that it's virtually impossible for a human being to detect a difference then... I'm a human being, so not much point in testing.

As bigshot noted the codec is important, but in general tests I've seen on Hydrogenaudio and elsewhere seem to indicate that LAME V2 is transparent to most (exceptions are uncommon) and LAME V0 is essentially transparent to all. Thus LAME 320 would be the same but V0 would be a little more...

As long as you are using AptX or above there really shouldn't be a significant (meaning easily audible) difference over an advanced BT codec vs USB (at least when using a receiver such as the ES100.) You might want to verify that you a not using SBC.

Ah yes, the app does note that it is supported in Mac, I stand corrected. Well, about the Mac application anyway, you still aren't going to hear it ;)

Just FWIW in USB DAC mode only 16-bit depth is supported, not that you'd ever be able to hear the difference.

Some of us can remember the heydey of 'HiFi' in the 60s and 70s and unlike that time where analog equipment struggled to achieve a flat response, low distortion, good s/n figure, etc. and differences between grades of equipment were readily apparent, the equipment of today is so good that we are...

Ah, I understand. No, I don't know of a way to do that, if anyone else does maybe they can comment. I'd like to know too because I also have a problem with audio glitches on USB (random, so not exactly the same symptom as yours) and I've tried everything I can think of to cure it. I haven't...

You can simply turn off Bluetooth on the phone. ES100 USB audio will still work, although you won't have control of options available via the app.

Many people like to top off the charge while listening (say when sitting at a desk) on a routine basis. In this case having to constantly go in and out of the app is not acceptable.

I think most users would agree that the power state should not change when charging. The Radsone people have been pretty responsive in adding/changing features in firmware updates and I think they monitor the forum, plus you can provide feedback on their website.

There are a few power options but they will probably have undesirable side effects for typical use. The easiest solution is to simply switch the power off after plugging in the charging cable, it only takes a few seconds.

Well that is strange because while I do have to turn it off after connecting the charger (admittedly odd but not really a problem) the unit does not turn on by itself when changing is completed. Are you using the most current firmware release (2.0.2)? If so I have no explanation as to why our...

I just checked and my ES100 (running current firmware 2.0.2) stays off when charge is complete. I plugged in the charger, turned off the unit (flashing LED stopped and I observed a steady red circle LED, indicating charging) and left it to fully charge.When it was fully charged the steady red...

Yes, I updated my post just before you responded, setting that mode will prevent you from using the device while charging. I hadn't noticed the behavior you describe but if that's what it does... strange. But even if powered on, since it is still connected to the charger does the internal...

Under the 'Power Option' menu (touch the battery level bar to get there) there is a setting 'Auto power off when charger is connected'. That might do what you want, although it would prevent you from listening while charging.