Hey,
I spent a month in barcelona last summer, but unfortunately I couldn't get in touch with any DB related things- the symphony's season was over. I think they have summers off.
But I HIGHLY recommend checking out the Palau de la musica catalana. (
http://www.palaumusica.org/virtual.html) It is breath takingly beautiful. Take the tour if you can- they play the Bach D minor toccata and fugue on the organ. If you're lucky there will even be a concert while you're there. I missed Vienna by a week! Damn it!
Non-bass related you must see parc guell and climb the tower to the top of the sagrada familia.
Tell me how it goes
