Editing Combination tone (section)

==Resultant tone==
A '''resultant tone''' <!--(obsolete)<ref>Randel, Don Michael (2003). ''The Harvard Dictionary of Music'', p.192. Harvard. {{ISBN|9780674011632}}.</ref>{{why?|date=February 2018}}-->is "produced when any two loud and sustained musical sounds are heard at the same time."<ref>Maitland, J. A. Fuller; ed. (1909). ''[https://books.google.com/books?id=8gE9AAAAYAAJ&q=resultant+tone Grove's Dictionary of Music and Musicians]'', Volume 4, p.76. Macmillan. {{pre-ISBN}}.</ref>

In [[pipe organ]]s,<ref>
{{cite book
 | title = A Comprehensive Dictionary of Organ Stops: English and foreign, ancient and modern: practical, theoretical, historical, aesthetic, etymological, phonetic
 | edition = 2nd
 | author = James Ingall Wedgwood
 | publisher = G. Schirmer
 | year = 1907
 | page = 1
 | url = https://books.google.com/books?id=he8PAAAAYAAJ&pg=PA1
 }}</ref> this is done by having two pipes, one pipe of the note being played, and another harmonically related, typically at its [[perfect fifth|fifth]], being sounded at the same time. The result is a pitch at a common [[subharmonic]] of the pitches played (one [[octave]] below the first pitch when the second is the fifth, 3:2, two octaves below when the second is the major third, 5:4). This effect is useful especially in the lowest ranks of the pipe organ where cost or space could prohibit having a rank of such low pitch. For example, a 32' pipe would be costly and take up as much as 16' of vertical space (if capped) or more commonly 17-32' (if open-ended) for each pipe.  Using a resultant tone for such low pitches reduces the cost and space factor, but does not sound as full as a true 32' pipe. The effect can be enhanced by using further [[Organ pipe|ranks]] in the [[Harmonic series (music)|harmonic series]] of the desired resultant tone.

This effect is most often used in the lowest octave of the organ only. It can vary from highly effective to disappointing depending on several factors, primarily the skill of the organ voicer, and the acoustics of the room the instrument is installed in.

It is possible to produce a melody with resultant tones from multiple harmonics played by two or more instruments. There is [https://www.youtube.com/watch?v=k7p5tDekMjY an example with seven saxophones].