the OCVE resource now comprises a broad range of primary source materials for Chopin's Ballades (Opp. 23, 38, 47 and 52), Preludes (Opp. 28 and 45) and Scherzos (Opp. 20, 31, 39 and 54) as well as the Fantasy Op. 49 and Polonaise-Fantasy Op. 61. These materials can be manipulated in a wide variety of ways, allowing new insights to be gained through extraction, comparison, juxtaposition and collation.
Discogs is a user-built database containing information on artists, labels, and their recordings. Discogs also incorporates a Marketplace where you can buy and sell the recordings. Discogs is constantly growing as users submit releases to the database.