After reinstalling the image „m2p_stretch_rpi_v249“ (from the Max2Play download page) and configuring accordingly, there is no audio signal from the DAC+ sound card any more!!!
By operating from Kodi GUI and HDMI screen/speaker sound is normally available!
in the web-based setting, Plugins, MPD has been removed prior to activating Kodi
HiFiBerry DAC+ (B+/pi 2/3/4) is activated and the sound card „HiFi Berry DAC+ (Pi 2/3)“ is displayed in Raspberry/Settings