Bug in minecraft pe not download music

I do not download the music of minecraft pe and I have 486 MB and there it says that the music weighs 78 MB and teng 486 MB I do not know if it is a mistake of my phone or the minecraft my android is 5.1 is a lanix ilium X210 happens to me in the 1.0.4.1 and also in 1.0.3 it seems that it is a minecraft error please solve it