If you want to hear romantic piano at its most brilliantly intense, then Hélène Grimaud is your ticket. The French-born artist stunned the world some 20 years ago when, at the age of 16, she won a Grand Prix du Disque for her recording of Rachmaninoffs Piano Sonata No. 2. Grimaud performs the Rachmaninoff this week, along with those two Chopin gems, the Berceuse and the Barcarolle, and two Rhapsodies, Op. 79, by Brahms a fiery, sensuous program guaranteed to show off playing that has been described as stormy, passionate and intuitive. Grimaud is particularly known for her unheard-of sensitivity to emotional shades, which might be attributed to the fact that shes one of those rare individuals who experiences synesthesia, the overlapping of two senses in this case the ability to actually see music as color. Prepare for a human laser show. Walt Disney Concert Hall; Sun., June 17, 7:30 p.m.; $33-$86. (213) 850-2000 or www.laphil.com.