Amati Quartet ; Willi Zimmermann, violin ; Barbara Suter, violin ; Thomas Wicky, violin (1st work) ; Johannes Degen, violoncello ; Nicolas Corti, viola

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String Quartet: I. Lento (7:38) -- String Quartet: II. Prestissimo (2:54) -- String Quartet: III. Larghetto (7:29) -- String Quartet: IV. Allegretto leggero (3:47) -- Klangexpressionen (9:11) -- Colori e Movimenti (11:00) -- String Quartet No. 2: I. Adagio (4:32) -- String Quartet No. 2: II. Allegro energico (2:10) -- String Quartet No. 2: III. Lento (5:26) -- String Quartet No. 2: IV. Allegro molto e deciso (2:16) -- String Quartet No. 2: V. Cadenza, senza misura (2:16) -- String Quartet No. 2: VI. Molto tranquillo e espressivo (2:33) -- String Quartet No. 4: I. Preambolo (3:18) -- String Quartet No. 4: II. Sonata (11:09)