Has anyone read this article?
Congregational Singing in the Rus' Liturgical Traditions:
An Evaluation of Its History
Melita Mudri-Zubacz (347)
By means of original research into various liturgical and musical manuscripts, especially those pertaining to the East-Slavic Churches as found in the Hilandar Research Library and Resource Centre for Medieval Slavic Studies, the author demonstrates that the eclipse which congregational singing suffered among the East-Slavic Churches during the latter part of the second millennium was an inorganic development of an earlier tradition in which the lay people, aided by various "musical ministers" and led by the clergy, retained pride of place in singing the responses and participating actively in the eucharistic liturgies as well as the other services such as matins, vespers, and compline. This eclipse of lay congregational participation was brought about in part by the rise of choral ensembles, polyphonic arrangements, and increasingly vastlyand in some cases needlesslycomplicated settings of liturgical chant, all of which required trained "specialists" whose role came, in most Churches, to supplant entirely the role of the laity, who were thus rendered passive, mute spectators, deprived of the spiritual benefits which attend fuller participation in the liturgy.
LOGOS VOL. 46, 3-4 (2005)