marketing choices like not putting a link to soundbox on its homepage, says classical music critic joshua kosmanveÑi too much information that will bring in the regulars and squeeze out the newcomers and the adventurers. >> reporter: kosman said that symphonies need to justify their existence in a landscape crowded with entertainment options. ♪ san francisco symphony board president sakurako fisher argues that soundbox is about more than selling tickets; it's about staying relevant. >> it's not a business, it is part of the necessity of the human heart. it's a part of what makes a vibrant community. >> reporter: if the current run of sold-out performances means anything, soundbox may be the prototype for the next era in classical music. ( applause ) this is pbs newshour weekend saturday. >> sreenivasan: and now to viewers like you. your comments about some of our recent work. we heard from many of you about last sunday's signature piece exploring whether gambling on sports events should be legalized.Ñi many of you told us you think it's a bad idea. donna williams-terry wrote us:Ñi "it would be e