+puff_up_factor = (linethickness# - 0.1 staff_space#) / (0.1 staff_space#);
+
+
+
+stemthickness# := 1.3 stafflinethickness#;
+ledgerlinethickness# := 2 stafflinethickness#;
+
+define_pixels(staff_space, stemthickness);
+define_pixels(stafflinethickness, ledgerlinethickness, linethickness);