Tonight at 7 pm, Trout Week reaches its finale in The Greene Space. The Tokyo will apply its "Paganini Quartet" of matched Stradivarius instruments to works by Haydn, Bartók and Beethoven. Watch the live Webcast at WQXR.org and get our free "catch of the day" download.

Shoppers at Zabar’s got an unexpected treat with their smoked fish, cheeses and baked goods Wednesday morning. The Escher String Quartet planted itself in front of the fish counter of the Upper West Side food emporium and began playing the first movement of Beethoven’s “Serioso” Quartet. Watch the video and check out some images below:

Upper West Side shoppers got an unexpected treat with their smoked fish, cheeses and baked goods Wednesday morning. The Escher String Quartet planted itself in front of the store's fish counter and began playing Beethoven’s "Serioso" Quartet.

Skittering strings. Large, looping passages. Perfectly eerie little scenes. Such is the sonic landscape in which the JACK Quartet can frequently be found. The adventurous ensemble is in The Greene Space tonight at 7 pm. Tune in for a Webcast at WQXR.org.

Trout Week continues at The Greene Space tonight with Ethel. The group has been a role model for anyone who believes that a string quartet can act and even sound like a rock band. Read more and get a free Catch of the Day download.

The Ebène Quartet is the rare ensemble that can play Haydn and Debussy with complete command and then shift gears and offer a jazz set of Miles Davis and Chick Corea. See them tonight at 7 pm on a live video Webcast on WQXR.org. Plus, get a free download.

Trout Week continues tonight with the Ensemble ACJW. A collective of about 20 hand-selected graduates of major conservatories, ACJW is a partnership among the Juilliard School, Carnegie Hall and the Weill Music Institute. Read more and get our Catch of the Day download.