Arthur Ferrante, one half of the piano duo Ferrante and Teicher whose lush orchestral recordings of 1960s movie themes propelled them to popular and commercial success, has died. He was 88.

Mr. Ferrante died of natural causes Saturday at his home in Longboat Key, Fla., his manager, Scott W. Smith, said yesterday. Lou Teicher died in August 2008 at age 83.

"Although we were two individuals, at the twin pianos our brains worked as one," Mr. Ferrante said last year after Teicher's death.

The classically trained pair met and became friends at the Juilliard School in New York City, where they both had enrolled as children. A few years after graduating, they rejoined as a piano duo and toured throughout the 1950s, playing 9-foot concert pianos while facing each other on stage. The pianists relied on their classical repertoire during the main concert performance but skipped to pop songs and novelty tunes for encores.

Over the course of their 40-year partnership, the "Grand Twins of the Twin Grands" recorded 150 albums, racking up 22 gold and platinum records and selling 90 million records worldwide, and they performed 5,200 concerts before retiring in 1989.

"They made beautiful music, but they were not easy listening," Mr. Smith said. "They were very dynamic."

In 1960, Ferrante and Teicher teamed with producer Don Costa to record their arrangement of the theme to the Billy Wilder film "The Apartment." The single shot up to Billboard's Top 10, as did their next movie recording that same year, the theme to "Exodus," based on Ernest Gold's soundtrack music. The duo continued to please their audience with embellished versions of movie music performed by their twin pianos with a full orchestra and chorus.

Next up was a Top 10 recording of "Tonight," Leonard Bernstein and Stephen Sondheim's song from "West Side Story" in 1961. They soon became known as the Movie Theme Team after releasing themes from "The One-Eyed Jacks" (1961), "Lawrence of Arabia" (1962), "Cleopatra" (1963) and others. They finished the decade in 1969 by earning a Top 10 hit with the theme from "Midnight Cowboy," based on John Berry's soundtrack tune.

"'The Apartment' record came out while we were on tour, and after just a couple weeks we started noticing our audiences were acting different," Teicher told the Chicago Tribune in 1987. "Whereas before they would be listening raptly to our classical music, now they were rustling their programs and obviously not too interested in what was going on.

"So we did the only thing we could: We switched styles, and we haven't regretted it for a minute."

Arthur Richard Ferrante was born Sept. 7, 1921, in New York. Three years older than Teicher, he entered Juilliard at age 9. They both studied piano with Carl Friedberg, and Mr. Ferrante graduated in 1940. He returned to Juilliard a few years later as a piano instructor and played at night in clubs with Teicher. In the late '40s the duo began touring North America and in 1952 made their first recordings.

Showmen from the start, they weren't content merely to play notes from a sheet of music. They altered their pianos, adding mutes and other objects such as metal chains, glass, wood and cardboard to the strings to create different sounds. They didn't only strike the keys; they would pluck, pound or strum the strings inside the piano to make alternative sounds.

These "gimmicks," as they called them, landed them on the leading variety programs of the day, including "The Ed Sullivan Show," "The Tonight Show," "The Dean Martin Show," and invitations to perform at the White House for Presidents John Kennedy, Richard Nixon and Ronald Reagan.