That is due to VC being inaccurate, IIRC. Gameboy/Gameboy Color VC is emulated and isn't emulated well.Thank you for this tool! I had luck with some games, but not with others. Shantae and Super Mario Bros. Deluxe, for example, have sound glitches (stuttering and skips) on the title screens. Anyone else experience this problem? Are there any settings that can be selected to correct this? Running on New 2ds.