1. On your computer, open any text editor (e.g., Notepad).
2. Save a blank file as “.nomedia” (make sure you include the leading period and that save as type is set to “All Files” instead of “Text documents”
3. Copy the blank “.nomedia” file to the folder on your SD card containing the  audio files you don’t want to show up in Music
4. Restart your phone and the files will no longer show up in Music
5. Same thing works for pics you don't want to show up in Gallery