How do you mute this ingame?

[CHESS]

I like playing this while i have a podcast playing on the background... Pacman sounds are too loud....

[welcome to the BOG]

Volume mixer, bottom right on your windows taskbar, right click the volume icon, and "Open Volume Mixer" (you need to have pac-man opened the first time you do it) then find pac-man in the list of programm and set the volume bar to the lowest point.