Praise be to Allaah.
If you cannot stop the music in the bus and you need to
travel on it because the distance is too great, and you do not have any
other means of transportation, then there is no sin on you for that, but you
should denounce the evil as much as you can, even if it is only in your
heart.
And Allaah is the Source of strength. May Allaah send
blessings and peace upon our Prophet Muhammad (peace and blessings of
Allaah be upon him). End quote.
Fataawa al-Lajnah al-Daa’imah li’l-Buhooth al-‘Ilmiyyah wa’l-Ifta’ (26/241).