New Age music cds are peaceful music cds of various styles that is intended to create relaxation and positive feelings. Some but not all new age music is associated with New Age beliefs. New Age music is typically relaxing and inspiring, and is often used by listeners for such activities as yoga, massage, meditation, reading, as a method of stress management or to create a peaceful atmosphere in their home or other environments. The harmonies in new age music are generally modal, consonant, or include a drone bass. The melodies are often repetitive, to create a hypnotic feeling, and sometimes recordings of nature sounds are used as an introduction to a track or throughout the piece. Songs of up to 30 minutes duration are common. New Age music includes both electronic forms, frequently relying on sustained pads or long sequencer-based runs, and acoustic forms, featuring instruments such as flutes, piano, acoustic guitar and a wide variety of non-western acoustic instruments. In many cases, high-quality digitally sampled instruments are used instead of natural acoustic instruments. Vocal arrangements were initially rare in New Age music but as it has evolved vocals have become more common, especially vocals featuring Sanskrit, Tibetan or Native American-influenced chants, or lyrics based on mythology such as Celtic legends or the realm of Faerie.