The splitting of a complex sound wave into its various frequency components, as the sound wave passes from one medium to another.
"Recent order: 111633 The sonic quality of the CD's I received is just absolutely excellent! Worth ever penny of the transfer fee, hands down. Nice clean crisp high frequencies and good solid lows without sounding muddy or over-processed. Even better quality sound than I remember hearing when the disk was new. All this from a piece ..."