wikipedia defines conceptual art as,

"art in which the concept(s) or idea(s) involved in the
work take precedence over traditional aesthetic and
material concerns"

in other words, the concept is the key element of the
work - not its physical manifestation

Leif Inge's 9 Beet Stretch is an example of concept-
ual art

Inge, a Norwegan artist, took Beethoven's 9th
Symphony and he S-T-R-E-T-C-H-E-D it

that is, he converted a 1 hour symphony to a day-
long musical marathon

he did so with the use of audio software that de-
creased tempo by a factor of 24 while maintaining
pitch

therefore, as in the sample video below, 1 sec-
ond of Beethoven's 9th Symphony becomes 24
seconds of Inge's 9 Beet Stretch

the results of Inge's experiment were surprisingly
good -

Kyle Gann, of The Village Voice called 9 Beet Stretch
a "conceptual tour de force", he writes -

"The second and third movements are remarkably
lovely, eight hours of ethereal ambient music
between them. The isolated violin notes of the
scherzo's fugue turn into gossamer lines, while the
slow movement's dissonances and suspensions take
forever to melt, holding the ear rapt . . . I find this
330-minute version of the Adagio a considerable
improvement over the original. Who would have
thought that Beethoven could have been a great
ambient composer, if he had only divided his
metronome markings by a couple dozen?"

check out the video below for a sample of
9 Beet Stretch, it's 24-second soundtrack is
1 second of Beethoven's 9th__ S-T-R-E-T-C-H-E-D