Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I'm trying to identify what this symbol is (circled in pencil) in the sheet music for Mazurka no.4 op.17 by Chopin. It looks like two connected diamond shapes, and I can't find an explanation of it anywhere.
I grabbed a file from imslp.org and found your measure. It is a simple mordent.
Required, but never shown