Simulated Music, released in June 2011, was a cycle of music created at speed. As i wrote at the time, “critical decisions … were made with a minimum of deliberation. Once they were decided, i worked quickly, not concerning myself much with minutiæ, thinking instead about the broader, gestural shape of the music as a whole”. Nonetheless, the process that led to each ‘Simulation’, while relatively brief, contained a considerable amount of experimentation, as it was worked into its final form. On several occasions, i produced more than one version of a piece, uncertain of which i preferred; only when finally assembling Simulated Music did it become clear which versions of the pieces should be used. This ‘postscript’ contains nearly all of the alternate versions.