The orchestral effects and tonal shadings which are produced with such splendid results through the use of the double bass Chromonica have been the means of many Harmonica Orchestras winning high praise for their musical skill and ability to render the most difficult selections. Two Harmonicas, one above the other, joined by hinges, presenting a most unusual instrument that is unique in its appearance. This instrument is especially designed to provide the bass accompaniment for ensemble playing. The lower half of the instrument embodies the natural tones of the scale, the upper half the sharps and flats. The tones of the instrument are die-stamped on the top cover of the top Harmonica. This instrument is played in a manner entirely different from that of the standard Chromonica inasmuch as the holes are sufficiently far apart to enable the player to produce a single tone without the use of the tongue, which is the essential feature when playing the regular styles. The #268/78 seems to be far more popular among the European and Asian players than in the U.S., for its extended range. However, the additional notes are on the high end, rather than the low end, so the upper octave gets rather high - well into the chromatic 64 range, and more susceptible to getting out of tune. Compared with the #265/58, it continues up the scale 5 more tones, to C (the 2nd C on the 280/64). This is an all blow instrument.