'Gigue (Suite in C Major)' is a movement from one of Bach's unaccompanied Cello sonatas, arranged here for tenor and bass. It has a fast 3/4 jazz feeling, with some tricky dove-tailing between the voices, the object being to make it sound like on instrument. The Swingle Singers have often used this 'Organ Fugue BMV 578' as a concert opener. The challenge in singing without a rhythm section is to make the piece swing without the help of the instruments.The 'Bourree' has probably been the most widely performed of all Ward Swingle arrangements. This is an a cappella version using three different styles: child-like 'la-la-la's,' gently swinging 'oo' sounds and rather brassy 'ah' sounds.