Musical cryptogram?

Question

Shostakovich uses his monogram in his symphony no.10.... DSCH. This equates to the notes D Eflat C and Bnatural. The H I understand as Bach used B natural to spell his name, but how does S turn in to Eflat?

Answer 1

In German E-flat is translated as "Es." Therefore, the letter S (sounding as "Es") is used in musical cryptograms.