Erityisesti kansanmusiikissa käytettävissä oktaaviharpuissa kaksi samanaikaisesti soivaa säveltä on viritetty oktaaviin.
Octave tuned harmonicas employ the same horizontal division of the
channel openings as tremolo tuned instruments and are also mainly
used in folk music. They all feature the curved „banana" form and
use the Wiener Octave Tuning, where upper and lower notes are tuned
exactly one octave apart, resulting in a full, powerful sound without
any tremolo beats.
Our Octave harmonicas are all hand-made in
Tremolo and octave harmonicas are 2-voice instruments,
where each blow and draw note is produced by two reeds sounding
simultaneously. In the case of the Octave models, each reed of a pair
is tuned exactly one octave apart, creating a full, voluminous sound.
With Tremolo models, both reeds produce the same note, but are
slightly out of tune with one another, creating an interference beat
so that the note sounds with a pulsating tremolo effect, a rapid
increase and decrease in volume. This is referred to as „tremolo
The tonal layout generally corresponds to that of
Richter harmonicas. As a rule the channels of 2-voice harmonicas are
divided horizontally, so that two channel openings lie one above the
other. The purpose of this is to decouple the oscillations of the two
reeds which are sounding simultaneously. Otherwise they will tend to
adopt the same frequency and vibrate in phase, thus preventing the
tremolo effect from occurring.
Tremolo and Octave harmonicas are
mainly used for
folk music and evergreens.
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