Frank Hoffman 
Encyclopedia of Recorded Sound [PDF ebook] 

The Encylopedia of Recorded Sound, 2nd edition, is an A to Z reference work covering the entire history of recorded sound from Edison discs to CDs and MP3. Entries range from technical terms (Acoustics; Back Tracking; Quadraphonic) to recording genres (blues, opera, spoken word) to histories of industry leaders and record labels to famed recording artists (focusing on their impact on recorded sound). Entries range in length from 25-word definitions of terms to 5000 word essays. Drawing on a panel of experts, the general editor has pulled together a wealth of information. The volume concludes with a complete reference bibliography and a deep index.