J. S. Bach, Mass in B minor BWV 232, in a stellar, groundbreaking recording from 1985, using one voice per part and a set of ripieno singers for the forte sections.
Taverner Consort and Players, conducted by Andrew Parrott. Emma Kirkby — soprano, Emily van Evera — soprano, Panito Inconomou — alto (child), Christian Immler — alto (child, nowadays a great bass), Michael Kilian — alto (child), Rogers Covey-Crump — tenor, David Thomas — bass

For first half: youtu.be/9myyCGSkvfw
Buy this CD here: www.amazon.com/Mass-B-Minor-Bwv-232/dp/B00005RFSB