Cours d'harmonie - 1.5 - Quartes, quintes, récapitulatif

New channel Gradus ad Parnassum: title sample judged 'whole' (An in-depth music harmony/counterpoint/analysis curriculum with structured lessons, exercises, and scholarly lectures, a); passed a second screen for sellers/exam-prep/re-uploads; 1 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.