German diacritical marks (ä, ö, ü, ß) appear as Chinese characters – how to fix?

Audio files (such as MP3, FLAC, etc.) are like small parcels. Inside each parcel, besides the music itself, there is a “product description” that we call metadata. It stores text information like song title, artist, album, and more. This description can be written in several different “languages” — the main ones being ISO‑8859‑1 (an older “dialect”) and UTF‑8 (the modern “universal language”).

The problem you are experiencing is caused by the player misinterpreting the character encoding of your music files’ metadata.

🔍 Core Cause: Character Encoding “Confusion”

  • Root analysis:
    When you organised your music on your computer, you likely used an older or region‑specific software. That software wrote the “product description” (metadata) in a “local dialect” (i.e., ISO‑8859‑1 encoding) and used that dialect to write German special characters (Ä, Ö, ü, ß, etc.).

However, your player (and the Android system it runs on) uses the modern “universal language” (UTF‑8 encoding) to read that description. The result is a decoding error — the player tries to force a one‑byte “dialect” into a two‑byte “universal language” framework, which ultimately displays unrelated Chinese characters on your screen. This is especially common when transferring files across different platforms (Windows → Android).

To put it simply: it’s like trying to read the English word “hello” using the Chinese Pinyin “ni hao” — you can produce sounds, but the meaning is completely lost.

💻 Solution (Three Steps)

The root of this problem lies in the audio files themselves, not in your player. The fix is straightforward: give all your music files a “universal instruction manual” that works everywhere.

1. Prepare the tool – Mp3tag

Mp3tag is a “language converter”. You can download and install it from the official website.

2. “Translate” the files – batch operation

  • Open Mp3tag and drag all the folders containing German diacritical marks into the program.
  • Select all files in the file list (Ctrl + A).
  • Start the batch conversion: click on Convert → Tag – Encoding in the top menu.
  • Key step: In the pop‑up dialog, change the “ID3v2 encoding” from the default ISO‑8859‑1 to UTF‑8. Then click OK.

3. “Re‑attach” the tags – save the changes

  • After conversion, you need to save the tags again so that the new UTF‑8 standard is actually written to the files.
  • The easiest way: select all files again (Ctrl + A), then click the red Save button on the toolbar (usually a disk icon).
  • Now all your files have that “universal instruction manual”.

💡 Why do I need to “save” once more?
Some software changes the encoding only in its own display, but doesn’t write it back to the file. Adding the save step ensures the changes are permanently written.

For FLAC / DSF users:
If your collection consists of lossless formats like FLAC or DSF, they typically do not use ID3v2 tags but Vorbis Comments. If you run into trouble with the steps above, right‑click on a column header in Mp3tag and enable the “VorbisComment” column to check. If you need more specific help, please let me know what your main audio format is.

🧹 Final steps & verification

  • Clear the player cache: On your MP3 player, go to Settings → Apps → Show system apps. Find “Media Storage” or similar, and clear its data. This forces the player to rescan your entire library and read the new UTF‑8 tags.
  • Re‑transfer the files: Make sure you delete the old files on your player and copy the corrected versions from your computer again.
  • Verify: Now you should see the German diacritical marks correctly displayed.

🏁 Summary

The problem occurs because the encoding used for your music files’ metadata does not match the encoding your player’s system expects. As a result, special characters are displayed incorrectly. This is not a hardware or firmware defect of the player.

I hope this information helps you resolve the issue. Feel free to reach out again with any further feedback.