Glossary entry (derived from question below)
German term or phrase:
spielerisch zwischen Nachdenker und Partytier, zwischen Anspruch und Leichtigkeit changieren
English translation:
effortlessly jump between philosopher and party animal, between challenging and accessible
German term
Germany
Never lost in translation
Native in: German 
, English
Works in: English to German, German to English, French to English, and 4 more.
der spielerisch zwischen Nachdenker und Partytier changiert
To keep the sentence within the limits of accepatibility...I only need the part starting after the comma...
Jan 28, 2009 17:49: Ulrike Kraemer changed "Level" from "Non-PRO" to "PRO"
Jan 28, 2009 20:48: Marcus Malabad changed "Term asked" from "Help with sentence" to "der spielerisch zwischen Nachdenker und Partytier changiert"
Jan 29, 2009 10:23: Steffen Walter changed "Field (specific)" from "Tourism & Travel" to "Music"
Jan 30, 2009 08:39: Steffen Walter changed "Edited KOG entry" from "<a href="/profile/127434">Martin Wenzel's</a> old entry - "der spielerisch zwischen Nachdenker und Partytier changiert"" to ""effortlessly jumping between philosopher and party animal, between challenging and accesible (music)""
Proposed translations
effortlessly jumping between philosopher and party animal, between challenging and accesible (music)
| agree |
Helen Shiner
: or 'who switches playfully between ... challenging and accessible music'
8 mins
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Stephen Old
: I agree with your translation and would seek to answer your query by suggesting, as someone once told me, that the human brain is naturally "lazy"!
20 mins
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| agree |
Bernhard Sulzer
24 mins
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| agree |
Ulrike Kraemer
: accesSible
32 mins
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| agree |
Ingeborg Gowans (X)
: with little balu: "ss"
2 hrs
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| agree |
Ken Cox
: . challenging and accessible' is spot on, and I echo Stephen's comment: accessible music requires little understanding or appreciation of the art of music, while challenging music separates the wheat from the chaff
4 hrs
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playfully...between challenge and ease
This music is the search for balance between challenge and ease, composition and improvisation, beauty and chaos, the past and the current.
http://cdbaby.com/cd/fleschner2
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Note added at 55 mins (2009-01-28 18:08:26 GMT)
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More options: to slide/wander/romp/bob/toy playfully between...
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Note added at 1 hr (2009-01-28 18:22:12 GMT)
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Leichtigkeit (=Mühelosigkeit) ease
mit Leichtigkeit easily, with no trouble (at all)
http://dictionary.reverso.net/german-english/Leichtigkeit/fo...
United States
Psychology, economics, politics
Native in: English 
Works in: Russian to English, German to English, English
who switches playfully ... between demanding and light-hearted music
Germany
25 years in film industry
Native in: English , German
Works in: German to English, English to German
easily/playfully shifts ... range from breezy to demanding
"...who easily/playfully shifts from philosopher to party animal, offering a range from breezy to demanding." (I realize I've switched the latter two attributes, but it works better for me, if it's not too free for you...)
Discussion
What's challenging music - the first thing that comes to my mind in connection with "challenging music" is hard to play....
The aspect of lyrics must not be forgotten here.
Maybe it needs to be challenging lyrics/music.