I have the codecs, I play ogg files normally on Windows Media Player, but for some reason it don't plays on mIRC.
This means that the codecs were not installed correctly in Windows. There is nothing you need to do in mIRC to play ogg files other than use the /splay command. I just tested this here by installing the codecs from the Xiph.org website and /splay worked to play ogg files on Windows 10 and 11.
