Серёж, сделай пожалуйста раздел форума, спациально ориентированый на тремоло нармоники.
И дополняю идею:
Сделай в каталоге мелодий раздел, "Для тремоло гармоник"... Сам туда накидаю, как минимум...
Думаю, идея полезна!

Аккордовая гармоникаYes, believe it or not, there is a bass harmonica (also known as the bass harp). The harp at right is a Hohner Double Bass (348), which has a two-octave, fully chromatic range, starting with EE (the lowest note on a string bass or bass guitar). This model is made with two hinged bodies, the lower having all the natural notes, and the upper having all the sharps/flats. Each hole has two reeds tuned in octaves (i.e., it is an "octave" harp), and it is "all blow" (you don't get a different note - or any note - by drawing).
The chord harmonica is an essential part of ensemble performance and we're proud to offer the most exclusive instrument of its kind for your performance goals. Major and 7th chords arranged on the upper row, and Minor, Diminished and Augmented chords are arranged on the lower row. 192 holes among each 2 rows of top and bottom combs create the 48 chords. Chords and melody are very easy to play. Each note has 2 reeds which create thick and rich chord sounds.