The central importance of Jan Pieterszoon Sweelinck (1562–1621) for baroque keyboard music can hardly be overestimated. Siegbert Rampe’s scholarly performance edition is the first edition of Sweelinck’s complete keyboard works which differentiates between ‘works  of certain  authenticity’ and ‘works of doubtful authenticity’.  For the first time Volumes III.1 and III.2 inclu  de  all chorale  arrangements attributed to  Sweelinck or han de d down un  de r his name. Volumes IV.1 and IV.2 inclu  de  all dance and song  variations.<br>