The May 2020 version of the Raspberry Pi OS has modified the way that application software selects the audio device. This means that the only way to control the selection with the new RPi OS is by the Task Bar selector.
I have updated both Pi Presents Beep and Pi Presents Gapless so that device selection work with both old and new versions of the OS. The method of selection between old and new versions may not work for the old OS particulary if you have at some time used a USB sound device. Read thhe Release notes to fix this.
Beep has also adopted a set of Audio Device names that match those printed on the Pi’s printed circuit board and the taskbar menu. Pi Presents will accept the old names but if you edit the profile you will need to select the new names.