The refrain "three in four", which is found in the linen-work treatises, is chosen as the name of the ensemble of treaty singers, and describes the variety of singing methods (triplets, quadruplets, triplets in four) as well as the change in the composition of singers. In addition, the three-four is said when joint, conventional work is undertaken. All members of the ensemble have extensive experience in folk singing. They have participated in folklore expeditions for many years, studied various styles of singing and listened to archival recordings, but in singing they do not try to copy the voices of archival recordings, but try to understand the secrets of the old ways of intonation and articulation, thus revealing the distinctive timbres of the voice.