[youtube]http://www.youtube.com/watch?v=N36TWwH98gE[/youtube] This Friday and Saturday October 22 and 23, Andrea Liberovici’s multimedia work Mephisto’s Songs premieres a part of the Apollo Theater’s Salon Series. I’m not familiar with Liberovici, but I am familiar with Mephisto’s featured performer singer Helga Davis. In addition to Ms. Davis’ amazing vocals, the piece includes recorded narration by Robert Wilson and cello improvisations by The Kronos Quartet’s awesome Jeffrey Zeigler. Live musicians for this performance include Clarice Jenson (cello), Fred Cash Jr. (bass), and Abe Fogle (drums). Some of you may be familiar with Helga Davis as a host of WQXR’s Overnight Music. She works