Pleasurize Music Foundation is making a very good application for the
Measure of
loudness of a song or album. You can get the application to become a member of the organization
Pleasurize Music Foundation. But they also make a version that can be used in foobar (audio player) and all for free download before you even decide to become a member.
Pleasurize Music Foundation, call the application with the name
DR Metering, DR (Dynamic Range), although for some people, especially among audio experts consider how to label it a little ambiguous, but the result of
DR metering is quite useful for all walks of music listeners. They release of a very convenient tool
DR Metering the which is compatible with almost all formats and supports direct readout from the CD drive. This fulfills a desire of the DR Manifold user community. Foobar2000 is a free and very versatile media player.
Here's an explanation of the
DR application metering and Foobar, I get from the official website
Pleasurize Music Foundation: