Quintet for Groups, for Orchestra (1973)
Sylvain Cambreling (conductor) , Baden-Baden Symphony Orchestra 
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: December 18, 2003, Milwaukee, Wisconsin.
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The Contemporary Chamber Players Of The University Of Illinois. European premiere. Recorded: September 1, 1966, Darmstadt.
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Kepler Quartet: violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: August 16 & November 19, 2007, Milwaukee, Wisconsin.
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: May 15, 2009, Milwaukee, Wisconsin.
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Vocals – Ben Johnston. Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: March 15, 2012, Milwaukee, WI.
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: July 29, 2002, Milwaukee, Wisconsin.
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String Quartet No. 4 `Amazing Grace` (1973)
David Harrington (violin), John Sherba (violin), Hank Dutt (viola), Sunny Yang (cello) , Kronos Quartet 
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded: June 22, 2005, Milwaukee, Wisconsin.
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded in 2015, Milwaukee, WI.
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Kepler Quartet: violin I – Sharan Leventhal, violin Il – Eric Segnitz, viola - Brek Renzelman, cello - Karl Lavine. Recorded in 2014-15, Milwaukee, WI.
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