One-line twaalftal “c ” together with small twaalftal “c”.
Small twaalftal “c” together with contra twaalftal “1C”.
A complete set of tones consists of 12 tones, called the "twaalftal". Each note gets his own place in the whole. These places are in each scale the same. Each “twaalftal” have its own scale, indicated by an own "key".
c cd d de e f fg g ga a ab b
c cd d de e f fg g ga a ab b
