If you do not hear music, check the following settings:
Check whether your speakers are properly connected and switched on .
Check whether the volume knob on the speaker is turned up sufficiently.
Check the Volume in the computer is turned up. You can find the volume setting in the Volume Control properties.
To find Volume Control, go to Start --> Programs --> Accessories --> Entertainment, and it would be listed under it.
Increase the volume on the speaker and volume in the computer to adjust how loud you want to hear.
Note that these are music files, which are large in size and take longer time to download, and if you have a slow connection or a computer that has less speed or low ram.