In J.
R.
R. Tolkien's 'Silmarillion' glossary, "Vallin" is formed by the two words "lin"-to sing, and "
val"-with strength.
Vallin, the lead singer and
bassist for Song For all Seasons (www.groups.
yahoo.com/group/songforallseasons) does an especially moving rendition of Handel's "Thou That Tellest" ("lift up thy voice with
strength, be not afraid").