Me too - experiencing unexpected dropouts / playback stops using Arc on my Samsung S22 Ultra as well as on my iBasso DX320X. No change concerning this behaviour after updating to the latest build yesterday…
This feature is still broken for me using my fiio btr5 over usb. It will connect and play fine at first (though it does make a loud pop when I press play) then as soon as a song plays with a different sample rate than the first song played it won’t switch sample rate and it will play back either too slow or too fast and pitched down or up. Most of the time I can just unplug usb and plug back in which forces it to switch to the correct sample rate when I press play again (more popping) but this is not ideal since I have some albums with multiple sample rates even within the album.
If it helps to know I am using a samsung galaxy s10e fully updated running android 12 with samsung’s one ui 4.1 and that’s connecting to the fiio btr5 over usb. Roon arc and core are fully updated too.
Uapp is able to make the btr5 switch sample rates just fine with no popping at all so I know it’s possible to make it work correctly with this hardware configuration. Hopefully arc can be fixed soon.
Popping is also present with FiiO ka3 and btr7. It’s also present when using desktop app for Mac and Linux roon bridge (with alsa), not only ARC. I suspect this is issue with RAAT, but I may be wrong.
Also ARC is missing the core mqa decoder. In BT mode it support 44/16 only and it’s tied to the android audio, so when I start listening, and get notifications I can hear them, which actually brings negative listening experience. I am still mainly use UAPP and I am waiting for ARC to mature enough.
just posting and sharing/confirming that ARC no longer has issues with the A&K HC2. playback volume is normal now (not full blast like on release). music sounds great out of the HC2 and 64audio A12T, via a Samsung Note 20 Ultra.