Helmut Walcha was one of the most influential organists of the 20th century. His Chorale Preludes stand as a testament to his enrichment of the Lutheran tradition, building on the inheritance of Baroque masters to create works of great expressive clarity and contrapuntal transparency, as well as introducing highly individual organ colours and sonorities. Volumes 1 and 2 of this four volume complete collection can be found on Naxos 8572910 and 8572911.