My setup consists of the Logitech Media Server (LMS) running on Windows 10 feeding a number of RPis each with either a DAC+ Pro, or AMP2 HAT, and all running the HiFiBerryOS.
When crossfading is set in LMS, at the final second(s) of the transition (which is set at 10 seconds) there is a sudden burst of energy manifesting itself either as a momentary surge in volume, or a burst of noise.
I was certain that the problem was with the crossfading implementation in LMS, but, to my surprise, the latest HiFiBerryOS update to version 20200901 lessened the problem significantly(!), but not entirely, hence this post; to let you know that although to a much lesser degree, the problem still exists.
Thank you for your work