The other changes are more recent and restricted to Ü and Tsang. In Ü, the vowel sounds "a", "o", "u" have now mostly umlauted to "ä", "ö", "ü" when followed by the coronal sounds "i", "d", "s", "l" and "n". The same holds for Tsang with the exception of "l" which merely lengthens the vowel. The medials have become aspirate tenues with a low intonation, which also marks the words having a simple initial consonant; while the former aspirates and the complex initials simplified in speech are uttered with a high tone, shrill and rapidly.