[No. 1] Great opera stars (77:39)
[No. 2] Great singers in recital (78:59)
[No. 3] Music by 20th century international composers (75:14)
[No. 4] Music by 20th century Dutch composers (79:17)
The Royal Concertgebouw Orchestra with famous guest conductors (2 CD's) (78:38) & (71:10).