I installed a mp3 player from viking games. the file is called VikingGames.MP3Player.v1.20.full.SymbianOS6.18plus2.sis
Regardless the sendo x sound chip really is super duper like they say its just the software that it came with is crap. I do not hear any crackling at all ever with this player. The headphones are pretty loud and good sounding with this player as well.