From Arnold Schoenberg:
Dear ma & pa. How are you? I am fine. Love Arnold. Arnold love, fine
am I. you are how? pa & ma dear. dlonrA evoL .enif ma I ?uoy era woH
 .ap & am realD .read am & ap ?woh era uoy .I am enif ,evol dlonrA

Love, Arnie

From Philip Glass:
Hello heh heh hello, o-hell o-hell oh ellow ellow heh heh heh hello
 mama mama muh muh muh-mah, ah ah ah ahhh!
 Aye aye aye aye aye yam yam yam yam Eye yam yam Fie aye aye aye fuh fuh fuh
 fie un yun yun yun
 Hah hah aha hah ow ow ow wow ow wow ow ow ah hah aha haha are are are are huh hub huh huh yuh you? oooh. oooooh.

Sincerely, Phil

From Milton Babbitt:
Dear bi-polar source set, All members of the aggregate feelings matrix are demonstrating maximum congruity with respect to the positive experiential axis.

With affections invariant under transposition, Milton

From Anton Webern:
Hello. Hel. H.
 Olleh. Lo. Fi.
 I am I
 Fine.

From Pierre Boulez:
X=cm2
 1x2x3
 A+C
 Schoenberg is dead.
 Q to N

From John Cage:

John