otiasj, To fix bug for playing some MP3 slowly, you should fix NativeMethods.cpp. header2[3] = 0x10;//?? fixme header2[3] has information of sampling frequency and channel mode. You can find additional information at http://freespace.virgin.net/neil.wallace2/sony/oma.html http://nwe00xmp3man.svn.sourceforge.net/vi...amp;view=markup