Complex sentence: Plans for an album of several of Bach compositions developed from there, leading to a recording contract with Columbia Masterworks from Elkind's contacts; the label granted the pair artistic freedom to produce and release the album.
Split into simpler sentences: Plans for an album of several of Bach compositions developed from there, leading to a recording contract with Columbia Masterworks using Elkind's contacts. Colbumia granted Carlos and Elkind artistic freedom to produce and release the album.