Acronym Soup: H2?

Questions

(Fr.) - A popular dance form in the 13th and 14th centuries consisting of several sections (puncta) each of which has a first ending (ouvert) and a second ending (clos).?

(It., 'extinct') - Music to be played so that it is barely audible.?

(Fr., 'damp') - Indication to harp or cymbal players, etc. that sound must be immediately cut short.?

(Fr., 'study') - An instrumental piece to improve or demonstrate certain technical points. However, many etudes (such as those by Chopin) have great artistic merit.?

- (I) An instrumental or vocal piece intended to improve aspects of technique and of no artistic value. (2) The term for a keyboard suite in the 18th century. ?