György LIGETI - String Quartets, Nos. 1 & 2; Ramifications - DG 20/21 | Alfred SCHNITTKE - Concerti Grossi, Nos. 1 & 5 / Gidon Kremer, Tatiana Gridenko, et al. - DG 20/21 | Valentin SILVESTROV- Silent Songs / Sergey Yakovenko, Ilya Scheps, and Valentin Silvestrov - ECM New Series 1898/99 | Karlheinz STOCKHAUSEN - Kontakte - Wergo WER 60092