In the Music Resource Guide, on page 33, column 1, in the 1^st sentence under the header “The Reign of Terror,” “National Assembly” should be corrected to read “National Convention.” This same change should be made to the 3^rd sentence of the same paragraph.

In the Music Basic Guide, on page 6, Figure 1.4 is labeled incorrectly. The second harmonic shown should be labeled “Second Harmonic” and the third harmonic shown should be labeled “Third Harmonic.”

In the Music Resource Guide, on page 21, the last four sentences of the 1^st paragraph should read:

“Meanwhile, the Count has threatened to banish the young pageboy Cherubino from the court because the youth had been making advances toward the Countess. Cherubino runs to Susanna to tell her his problems, but they are interrupted by the Count, who attempts once again to seduce Susanna. Cherubino hides behind a chair, and the Count, in turn, must hide when Basilio—the meddlesome music teacher who has come to gossip with Susanna—arrives. Not wanting to be discovered alone with either the Count or Cherubino, Susanna hides Cherubino underneath a dress draped over a large chair, while the Count hides behind the same chair, still not having yet seen Cherubino.”

On the same page, the 1^st sentence of the 2^nd paragraph should read:

“…the Count (who has just emerged from his hiding place and shouts, “I heard it all!”), Basilio, Susanna, and—still hiding for the moment—Cherubino….”

And, the 1^st sentence of the description of Section I should read: “The Count emerges from hiding, outraged….”

In the Music Resource Guide, on page 26, in the 1^st sentence of the 1^st paragraph below the text from Don Giovanni, Elvira’s title should be Dona instead of Don.