Schwann Catalog

[3] The Schwann Catalog changed hands several times, sold in 1976, then again in the late 1980s to Stereophile, then to Valley Media in the 1990s.

In 2002, the company was purchased at a bankruptcy auction by Alliance Entertainment Corporation.

Later, the catalog split into Schwann Opus for classical music and Schwann Spectrum for categories such as pop, rock, country, jazz, religious, spoken word and international music.

The early editions indexed and reviewed LPs that contained the same classical works.

As the volume of music it catalogued grew, the amount of information for each entry was reduced to a single line.