Viols were made in different sizes. A set of viols of different sizes - perhaps four or five instruments - were sometimes kept together in a chest (large box) which is why they were called a "chest of viols". When they were played together people talked of a "consort of viols". A consort would normally have at least one treble, tenor and bass instrument. A "broken consort" meant a mixture of different instruments: viols, recorders etc. Lute and bass viol were often played together. They were tuned in fourths, with a major third in the middle.