When you load a CD+G (CD+Grafik) file, MP3+G, or MIDI/KAR file in Walaoke, the software performs a handshake with your graphics card driver. It asks: "Can you support Overlay Mixer?"

In Walaoke settings, manually select the correct display number for the singer's window. Walaoke Pro (Demo Version) Download

: Modern graphics cards (GPUs) often bypass legacy overlay techniques in favor of more advanced hardware acceleration, leaving older software like Walaoke struggling to find the "mixer" it expects.