Tongue thumping is also known as vamping,
in harmonica lingo. A chord, in music, is 3
or more notes played together.
If the player in the example is vamping, there
are very few actual chords (simultaneous playing
of three or more notes) available for use on a
solo system reed placement harmonica.
So, the performer uses various techniques to
give an impression of chords:
Vamping "oom-pa-pa" or "oom-pa"- the root
(lowest note) of the chord "oom", followed by
the 2nd & 3rd chord notes in a "diad", (two
notes played together):
E E E E E E
C G G, C G G, waltz; or C G, C G , etc., polka
Arpeggios ("broken chords"-playing the chord
melodically, one note at a time):
C E G, C E G, or the inversions E G C, E G C,
or G C E, etc.
Ghost notes (selected notes of a 3-note chord
are omitted, or notes not part of the traditional chord
are added) by the performer, omitted notes written
here in parenthesis (C), added non-chord notes are
written here as [d]:
f a (C)- on a key of C harp, the notes f-a draw are
available, but the F chord's (C) blow note is exhale.
Exhale and inhale reeds can't be played together.
The exhale C note is not played as part of the f chord.
An E minor chord (E g b) is not playable, the E note is
an exhale, the g b notes are inhale.
d f a b- on a key of C harp, all 4 notes are playable
together inhale, but not as a d minor chord. The b note
may be added to the d minor chord, changing the chord
to b diminished chord, or d minor 6th chord. Those are
not always acceptable to the listener's ears, or to the
composer's intent.
Three-note chords available on a key of C solo system
slide chromatic, slide out:
C and C inversions;
d minor and d minor 6th (a 4-note chord);
b diminished
The key of C solo system harp doesn't have an available
G dominant or dom. 7th chord, the second most important
chords in the key of C.
Hans Bilbus was disturbed by Larry Adler's use of improper
chords while Larry was vamping on his Super Chromonica,
so Bilbus invented the Hohner Harmonetta, patented in 1947.
Best Regards, Stay Healthy
JB