For the safest experience, I recommend sticking to the official expansion or exploring the PC modding scene if you are interested in custom rhythm game charts. Rip the Muse Dash Soundtrack - deltaepsilon

While "Telefonbuch" does not appear to be a known mod, Muse Dash does have a thriving custom song community, though it is primarily focused on the :

The most reliable way to get more content for Muse Dash on iOS is through the official App Store .

: If "Telefonbuch" was part of a specific chart title or a creator's name, it is likely a niche community creation not indexed in major databases.

: The base game typically includes roughly 62 songs .

If you are looking for custom content or ways to expand the game on iOS, you may be referring to the following:

: The game frequently features collaborations (e.g., Arknights, Touhou Project) which are available as in-app purchases. 2. Custom Songs & Modding (PC vs. iOS)