Double barrel
Doppeltonneumen consist of two Einzeltonneumen of the Gregorian chant , on any same or different pitch are provided, and thus represent the simplest form of Gruppenneumen represents. Gruppenneumen that are composed of three single tones are Dreifachtonneumen referred to, wherein the combination of Gruppenneumen is of Mehrgruppenneumen spoken .
In pes , the lower note is always sung first.
The most important double tons, which rarely exceed a fifth , are listed below in alphabetical order and, because of the variable intervals with regard to the position of the highest and lowest notes in the square notation, are only examples:
| designation | Square notation | Notation St. Gallen / Einsiedeln |
|---|---|---|
| Bivirga |
 
|
|
| Clivis / Flexa |  |
|
| Distropha |  |
|
| Pes / Podatus |  |
|