Hi, I have a Samsung Galaxy s20 ultra, and I had the same problem with my s10+, namely that when I stream music from my phone over bluetooth to any of the 3 different speakers, 2 bluetooth headsets and the car radio, the sound output is not consistent. It seems to pulse. If I want to listen to a track on my Sony WH-CH7000N headphones I cannot listen via Poweramp. I have to use the amazon music player or the samsung music player. This is really annoying as I prefer the equaliser on Poweramp and the spread of frequencies it allows. But it's this pulsing (which is the best way I can describe it) which really annoys me. It's rhythmic and I notice it on all tracks I play via bluetooth. It's not there if I plug in headphones, as my initial fear was when I had ripped a CD, something had happened in the conversion process.
Whenever I use wired headphones or another player, the musical output is at a constant level. The songs may go loud and quiet, but the output level doesn't change. But when I switch to bluetooth the output pulses.
I hope I've conveyed what I'm hearing. I did a search on the forums, but as I don't know the technical term for what I'm hearing, it's hard to search for, as searching for bluetooth problems is a whole can of worms.
My build is V3-build-882-arm64-play, and my phone, for what it's worth, even though it did the same when I had a 10+ is an SM-G988B/DS running Ui 2.5.
Hopefully we can sort this as it's really bugging me having to switch out of Poweramp to listen to Fear Inoculum by Tool on another app.