without rehearsal

It was played in the evening without rehearsal, with the ink scarcely dry on the paper.

Night by night it played the symphony of the world, and each night a new symphony was performed, without rehearsal.

"Carmen" was the second opera which I had to do without rehearsal.

Mr. Cody was confident that Mr. Hickok would take instant part in that drama without rehearsal.

It was copied in great haste by the scribes, and actually played for the first time without rehearsal.