In tourist-trodden Europe, many major summer music festivals have become the epicenter of a host of satellite festivals in their orbit. With the big events, e.g., Edinburgh, Salzburg, booked solid for months in advance, canny music shoppers are checking for the out-of-the-way festivals, even in the Mideast, which may be short on big-name talent but long on atmosphere. The smaller affairs can be found around almost any corner, and many offer intriguing programs.
Passau (July 27-Aug. 18) started its "European Weeks" with the hazy purpose of furthering European integration. That purpose was soon...