NB - this is one of a series of requests, collectively intended to improve
usability for users of Classical music.  See attachment for detailed proposed specification. See also 2696 - 2700.

We need a flexible multi-level browse command that lets the user pick the tag to browse on at each stage of the process.	 

For example, a user might want to select a performance of Beethoven's 3rd symphony conducted by Bruno Walter.  He might first browse on Composer, selecting Beethoven.  Then he might browse on Artist (or Conductor if he tagged his files that way.)  Then when he has narrowing the list of choices enough, he would browse on Album	 to select "Beethoven - Symphony 3 - Walter" from the list.

Later, he might want to hear something played by the violinist Heifetz.  He would begin by browsing on the Performer tag and select Heifetz.  Then he would pick Composer for the next browse.  At the next stage, he would select an Album naming a work by Beethoven to play.

When a user has a large collection, using the SB display and the remote with the current browse commands can become intolerably cumbersome if the list of Albums is very long. A flexible multi-level Browse command allows a user to tailor his browsing method to keep the list of choices to a reasonable level.

The browsing process would end when the user selects an album or a set of tracks to play by pressing Play or Add.

At each stage, the SB display would provide feedback.  The top line could display the tag values chosen so far and perhaps the number of Albums listed below.

To speed things up, the UI would display a list of albums after the list of tags that can be browsed.	So when the list of matching albums gets short, the user can just scroll down and select an album. 

** See attachment for more details **