https://bugs.winehq.org/show_bug.cgi?id=46725
--- Comment #18 from Ethan Lee flibitijibibo@gmail.com --- The problem stacks, so if the buffer size on the master changes, all the other buffer sizes change along with it in order to ensure that we are asking for enough data from the application. You can see these calculations here:
Sources: https://github.com/FNA-XNA/FAudio/blob/master/src/FAudio.c#L502
Submixes: https://github.com/FNA-XNA/FAudio/blob/master/src/FAudio.c#L569
audio->updateSize refers to the mastering voice quantum length.