There are certain situations where ramping doesn't happen. Perhaps Hugo can jump in here with an explanation why the behavior is to the contrary, but my personal opinion is that it should do it more often than it does. But you should still be seeing it happen SOME of the time.

Note that when it does it, it's pretty quick. It ramps up over the space of a few seconds. Perhaps your amplifier doesn't kick in until after it's done.

Another possibility is that your player thinks it's on home power. The volume ramp only happens in the car. Do you have a Dimmer option in your Settings menu?

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Tony Fabris