Magix Music used to work well on my HP laptop (O/S Windows 10, 64 bit) but now it doesn't. Firstly it would not select and play from the piano keyboard (to which I've received two helpful replies, thankyou, but still no joy) and now all I get is the following message: "The sample rate 44100Hz could not be set. Your sound card is possibly synchronized to an external source." What does this mean?