Be aware that Amazon Music has trouble identifying the high-res capabilities of the SP1000M and other A&K DAPs. It will usually work if you play a local 24/192 track before using AM but YMMV. Not sure why that wasn't mentioned as @RIGATIO specifically asked about Amazon Music. Here is a post...

I totally agree with you on that. I would, however be genuinely concerned about Android 8 lasting another 5 years based on past history. It's already almost 5 years old.

The reason the source volume has to be set at the maximum is because digital volume control reduces bit-depth when lowering volume and the stream is no longer bit-perfect. MQA needs all of the original bits to function and decode. This is not an UP5 specific problem.

Different USB port, USB 2 if possible. It's a pretty common error. Sometimes a reboot and retry will work as well.

OFS means that Tidal is performing the first unfold of MQA and the Gryphon is "rendering" the subsequent ones. Because MQA authentication is done on the first unfold, devices report OFS on the display. If the Gryphon was performing all unfolds and authentication (full decoder) then it would...

I'm using jdsp_v4.4.zip and Audio-Modification-Library_v4.1.zip from here: https://zackptg5.com/android.php I'm pretty sure these are the latest. I did need AML for it to work. Nothing else installed. I could not get Viper to process, but I prefer JamesDSP anyway for the high-res support...

Nah, I'm not an Android dev. I just have a fair amount of experience with rooting (and jailbreaking) from the beginning years ago and I try to keep up. I'm not sure the M3X passed Safetynet even before rooting. Did you check with YASNAC previously? Safetynet (and L1 widevine) don't seem to a...

It might be worth connecting to a computer USB port overnight. Believe it or not this usually works for a really dead battery. Nothing to lose by trying.

Unfortunately, I know more about rooting, jailbreaking, etc than I know about audio, but I'm trying to learn (now that I'm retired and have more time). Old man, new tricks and all.

Unfortunately the process to root Android devices isn't simple and I can't change that. Using QFIL (Qualcomm Flash Image Loader) to extract the boot partition from the device and patching it with Magisk is a bit tedious but that's what needs to be done if you want root access. I posted some...

Did you read the last 2 pages of this thread?

Output impedance should matter if you have low impedance IEMs like Shure SE846 (and others). Are you saying Sony hardware is somehow different?

Generic tutorials for working with QFIL: https://www.hovatek.com/forum/thread-31475.html https://www.hovatek.com/forum/thread-31476.html

Boot to edl mode, use QFIL with the correct firehose config to extract boot partition, reboot, patch with Magisk app and then use QFIL again (in edl mode) to flash patched boot partition, reboot to root.

The M3x can be rooted with Magisk using QFIL. See NP Audio boards for more information. I'm using JamesDSP on mine currently.