Static noises when using Muse Sounds: default buffer size is too small for some computers?
On Windows 10, possibly depending on hardware capabilities (I'm using a Lenovo Flex-15IML and an Acer ConceptD 3; both have this issue), any playback with Muse Sounds will have static sounds due to audio latency. This issue does not persist when rendering/exporting the score; it only affects playback.
One way to fix this is to increase the buffer size from 1024 to a higher value like 4096 under Edit>Preferences>I/O>Audio>Buffer Size. This will make the audio smooth in exchange for a bit more of a delay in playback. The value to set it at probably depends on computer hardware.