What is basso continuo?

New channel Alice M. Chuaqui Baldwin, harpsichordist: title sample judged 'whole' (Nearly every long upload is genuine instruction on harpsichord technique, basso continuo, tuning systems, or music histo); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.