I wanted to let you know I’ve bought a Samsung Android 6 device to test with, it should be here in the next few days. I hope to reproduce the graphing disconnection you’re seeing, because I haven’t been able to so far.
Regarding disabling one channel in graph mode: I just turn off the autofitting and swipe the channel I don’t want out of range. I didn’t want to add more controls than necessary.
Noise in buffer: I’m about 90% sure that what you’re seeing is the intrinsic sampling noise. If I set a meter on my desk to 8000Hz+256 samples, 60V input, I get a noise profile that looks like this:
Is this consistent with what you’re seeing?
Sorry this post doesn’t have any solutions, just trying to fully grok the problems.