The CD provides some technical information about the recording of the music:

This CD is an ADD recording. Multi-track analog tape was mixed to a digital format and then digitally mastered for the CD. The original multi-track recordings were all done on a twenty four track analog machine using Dolby SR noise reduction. Two-track masters were used in Crowd Sculpture, Parallelogram, Speaking In Swords, Sparrow Hawk Rowand River Of Nine Sorrows. These masters were transferred to the twenty four track machine where they were combined with the multi-track recordings, manipulated, and processed for the final results.Silver Apples Of The Moon was recorded as MIDI data into a computer during several performances and was edited and orchestrated from the computer before being recorded as sound information on the multi-track tape.