https://www.abebooks.co.uk/9780198167297/Langloz-Manuscript-Fugal-Improvisation-Figured-0198167296/plp
The Langloz Manuscript: Fugal Improvisation through Figured Bass (Early Music Series) - Renwick,...
What sorts of processes were going through the mind of J.S. Bach as he improvised a fugue in three, four, or even six parts? And what sort of training equipped...