Hi-Res Digital Download Klaus Mertens, Gitti Pirner – Felix Mendelssohn Bartholdy – Vergessene Lieder (Remastered) (2010) [FLAC 24bit/96kHz]
Hi-Res Digital Download Miriam Feuersinger, Klaus Mertens – Dialog-Kantaten (2023) [FLAC 24bit/96kHz]
Hi-Res Digital Download Klaus Mertens, Volodymyr Lavrynenko – Friedrich Theodor Fröhlich: Lieder & Elegies (2022) [FLAC 24bit/96kHz]