COMPUTE!’s Music System for the Commodore 128 & 64: The Enhanced Sidplayer by Craig Chamberlain is a 1986 guide and software package for creating, editing, and playing sophisticated music on the Commodore 128 and Commodore 64 using the SID sound chip. Built around the included Enhanced Sidplayer disk, the book explains how to use the Player and Editor programs, teaches basic and advanced music theory, and shows how to enter notes, edit songs, control waveforms, envelopes, filters, modulation, repetition, frequency effects, polyphony, and phrasing. It also covers Singalong songs with synchronized words, songs with pictures, merging Sidplayer music into BASIC programs, utility programs for managing songs, and practical tips for getting better sound from the SID chip, making it both a music-composition course and a detailed reference for Commodore users who want to turn the 64 or 128 into a capable home music system.