[ Ref. 101223 MMDigest, Zenph Recreates Sound of Great Musicians ]

Albert Petrak is informing us correctly.  However, one small but quite
important piece of information is missing: the songs belong together.
Wikipedia does help: http://en.wikipedia.org/wiki/Fritz_Kreisler 

"Liebesfreud" (Love's joy) and "Liebesleid" (Love's sorrow) are known
as Alt-Wiener Tanzweisen Nr. 1  and Alt-Wiener Tanzweisen Nr. 2
(Old Viennese Dancesongs #1 an #2).  They were composed in 1910, the
names and numbers are given by Kreisler.  [They represent] a common
method, in those days, of such opposite, mirrored compositions.

A couple of words on the differences between "Lied" and "Leid".  The
German word "Lied" covers a specific form of music, mostly a poem which
inspired a composer.  Like Goethe who wrote the poems Schubert used to
create "Lieder" -- which can be seen as operas in a nutshell!

The German word "Leid" indeed stands for sorrow, a feeling, which like
most feelings music can express perfectly.  Music, however, does not
needs words to express emotions.  Felix Mendelssohn Bartholdy (among
others), as you will know, composed a lot of "Lieder ohne Worte",
"Songs without words" -- which are, in fact, just melodies.

A "Weise" is a melody -- a song without words.  Kreisler's "Tanzweisen"
can be seen as such.

The German word "Wiese" also exists.  A "Wiese" is a meadow.  ;-)

Jan Kijlstra
The Netherlands