Yes, it is supported.
It's fine. I will buy your program!
Then another question:
How many devices does the purchased version of the program apply to?
Yes, it is supported.
The problem is that you are thinking that playing 16-bit over a 24-bit mode is not bit-perfect. There is absolutely no reason to want to achieve that. Even if you would succeed, it would be:
app 16-bit -> Android direct 16-bit -> oh, oops, the DAC only does 24-bit, so pad to 24-bit
whereas it now is:
app 24-bit -> Android direct 24-bit -> DAC 24-bit
Stop chasing ghosts!
It's fine. I will buy your program!
Then another question:
How many devices does the purchased version of the program apply to?
Is there a way to visually confirm this?
I don't see any point in sorting album tracks on file name. If you gave the albums a track number, the app will use that, given their are unique and successive.
You just need to enable the Quad DAC in the notification area and then you are set for the most part. Then it's a question if you play MQA tracks or not. If so, you need to enable the MQA flag in the HiRes driver flags (do NOT touch any of the other flags!) and enable bit-perfect mode. If you want to do some processing like EQ or MorphIt, then you don't need to do anything (except for not enabling bit-perfect).
Regarding the third screenshot: UAPP runs on thousands of different Android devices. It's not like options are removed when you run it on a specific device. In your case, it means that you don't need to change or worry about the Android audio settings since they are not used. Only the internal HiRes audio driver is pre-checked. The standard Android driver is NOT pre-checked unless you have a G7 model unknown to us, which would be rare.
The sample rate is set according to the source file sample rate when possible. If your track is 44.1, then it will play at 44.1. You say "Why is the sample rate set at 44khz? I play 24 bit files". Sample rate and resolution have NOTHING to do with each other. You can have 24-bit files at 10Hz or 8-bit files at 352800Hz, there is no relation whatsoever. Not sure what setting you unchecked, but I would advise at this point to go into the Android settings app, select Apps, USB Audio Player PRO and clear the app's data to clear all settings you may have changed. Please leave all audio options untouched, except for what I described above.
Never ever change the HiRes driver format. Changing that will most likely take you out of the HiRes direct path. The warning is shown below the preference option and the app will warn again when you have touched something in this area. For all 'known' devices to UAPP, these settings are all at their optimal values. Changing anything will likely send you straight to the Android audio 16-bit 48kHz mixer path.
I would like to see sorting by filename be either an option or a fallback solution for when files lack metadata. The digital recordings that are sold at www.abruckner.com often lack track meta data.
Tag editors have come a long way and are easier to use. Meta for Mac is outstanding. Sure there is similar for windows.
My files are properly tagged (I use Mp3tag) but it seems that UAPP doesn't like the A1, A2, ... B1, B2, numbering schemeWould tagging track and disc not achieve the same thing?
I am interested!Who has heard of highresaudio.com and who has a subscription there or would like to see support in UAPP?
SMH you’re putting letters in a field that requires numbers.
If it’s Side A track 3, put Track number as 3 and disc number as 1.
if it’s side B track 2, put Track number as 2 and disc number as 2.
This is exactly what I do for any vinyl rips and there’s no issues.