Using the little “tab” button to “exit” from the keyboard or go-to next field is a pretty bad experience; not intuitive.
How about a standard “X” to close the window? I know space is tight.
Also that “Save” button is pretty enticing. Can’t tell you how many times I create a new song, edit the name, and to he press save (to close the keyboard) when I wanted to edit the rest of the song settings.
These little things do impact the use experience disproportionally…