https://bz.apache.org/ooo/show_bug.cgi?id=128439
--- Comment #6 from Matthias Seidel <msei...@apache.org> --- Thanks for the clarification! Regarding m4a: You can always see such files using "all files" (I will add m4a to the list of audio files for the next release) However to get AOO/Windows play these files you need to install additional codecs. I took "K-Lite Codec Pack Basic" and it worked for me on Windows 10 with AOO 4.1.9: http://www.codecguide.com/download_k-lite_codec_pack_basic.htm -- You are receiving this mail because: You are the assignee for the issue.