Tune #1 is from the opera Oberon, by Weber.  Tune #2 is a traditional
tune called "La Tyrolienne"; it was also used in the ballet of
Rossini's William Tell.  I strongly suspect #6 is operatic as well.

Eric Stott
Albany, New York

 [ At http://dictionnaire.metronimo.com/index.php?a=term&d=1&t=9198
 [ (translated):
 [
 [ Tyrolienne
 [
 [ A popular song style in the Tyrolian Alps, where it carries the
 [ German name of either Yodeler or Dudler.  It customarily consists of
 [ a short suite of small melodic phrases which are sung without words
 [ on a few syllables or vowels, and whose special character is to
 [ constantly pass between the low register and the high register, from
 [ the chest voice to the head voice or falsetto.  Nearly all are in
 [ ternary rhythm.
 [
 [ These songs had a moment of European vogue in the 19th century:
 [ They were introduced or imitated in some operas, such the yodel sung
 [ in Rossini's "William Tell" (1829).  When these songs are executed
 [ by several voices, four or more singers enter in succession, the
 [ first singer stating the melody and the others taking it higher in
 [ stages.  All the songs are in three-quarter time.  There are neither
 [ imitations nor genuine answers, the secondary voices begin again the
 [ melody exactly, on the third and the sixth.  The accessory harmonies
 [ that occur at the beginnings or conclusions of phrases are very
 [ simple. ...
 [
 [ -- Robbie