A more recently developed tuning is commonly found on tremolos manufactured in or designed for Asia. This layout is derived from the "solo" tuning found in chromatic harmonicas and is sometimes called "scale" tuning. Here the notes of the major scale are found throughout the range of the harmonica without a separate chord section in the bass octave. This helps to facilitate a common practice in Asia of playing both a C and C harmonica stacked in order to achieve full chromaticity by having essentially the same notes available in each octave of the harmonica. This tuning is also applied to Tombo's S-50.