Excellent if lo-fi recording of three voices, two male and one female singing and building one note at a time a major chord triad, saying, "hello," thrice. I use it as a ring tone. Recorded with an ipod and griffin italk mic.
Example of atonal music which avoids octaves, avoids major and minor triads, avoids more than three notes from the same diatonic scale, and avoids conjunct melodies/uses disjunct melodies. From Schoenberg's Klavierstucke, Op. 11, No. 1.