St Ignatius Brianchaninov on the chants at Valaam Monastery.
The tones of this chant are majestic and protracted…they depict the groans of the repentant soul, sighing and longing in the land of its exile for the blessed, desired country of eternal rejoicing and pure, holy delights…These tones now drag on lugubriously, melancholically, drearily, like a wind through the wilderness, now gradually disappear like an echo among cliffs and gorges, now thunder suddenly…The majestic “Lord, have mercy” is like a wind through a desolate place, so sorrowful, moving and drawn out. The troparion “We hymn thee” ends with a protracted, shimmering, overflowing sound, gradually abating and imperceptibly fading under the vaults of the church, just as an echo dies out under a church’s arches. And when the brethren sing at vespers “Lord, I have cried unto Thee, hearken unto me”, the sounds emanate as if from a deep abyss, are quickly and thunderously wrested therefrom and rise to heaven like lightning, taking with them the thoughts and wishes of those at prayer. Everything here is full of significance and majesty, and anything merry, light-hearted of playful would simply seem strange and ugly.
You can buy CDs of the Valaam monks, who are truly amazing, at Liturgica (search on “valaam”). I’d also suggest you expose yourself to the Monks of Our Lady of Balamand Monastery in Lebanon (search on “balamand”), although all of their CDs are in Arabic.