Yesterday we covered a service called vloud that allowed users to make sound files louder. But as you know this service makes it easier for users to increase the loudness of their sound files but this does not amply that the output is lossless. If you want to use a permanent tool on your desktop to amplify the sound, try MP3Gain.
The usage is dead-simple, just add music files, hit Track Analysis and it will show you the volume, and track gain. You can se the target normal volume that you want to achieve(default is 89dB). Increasing the volume here will increase the track gain. It performs some statistical analysis to check how loud the file actually sounds to the human ear and then allows you to increase the dB according to this analysis.
When all is done, hit Track Gain the the changes will be applied instantly to that file. Apart from amplifying individual music files you can also perform a batch normalization so that every song has an equal volume.
It works on Windows XP, Windows Vista, and Windows 7. Enjoy!
Thanks Willem Nuijen!