Sentence:  Aeschbacher 's work is very much akin to Schnabel 's , but the sound on his Decca <WSD>disc</WSD> is dated , and you will have a hard time locating a copy of it . 
Meaning of the word marked with <WSD> tags:  sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove