While the first two albums were a trio format, the third album was more of an ensemble project.

While Powell recorded a handful of sides with a medium-sized band, much of his playing was done in the trio format.

The smallest ensemble that is commonly used in rock music is the trio format.

Then came Live at Donte's where the trio format proved very effective and opened even more avenues for Pass' talents in the year's to come.

The loose trio format aptly featured Konitz's unorthodox phrasing and chromaticism.

Of course, Mr. Pressler remains, and his piano is at the center of the trio format.

So Tortilla Army reverted to a trio format, something all three members were comfortable with.

This album was recorded in the "double trio" format of King Crimson.

Tatum recorded exclusively with the trio for almost two years, but abandoned the trio format in 1945 and returned to solo piano work.

Much of his work has been in the trio format.