Harmonics whose “voices” (musical notes) are produced by the simultaneous vibration of two equal notes, but with a minimum pitch difference in such a way as to create a tremolo effect when played together. These bagpipes do not easily allow the application of “Bend” and in no way allow “Over Blow” and “Over Draw”. Therefore, they are not appropriate for playing Blues, Country, Rock and others.
Although they can be applied in some themes or excerpts of these musical genres. They are widely used to play folk, regional, sertaneja music, among others. The models are very differentiated in form, sound and tuning. The Winning series is the conjunction of two harmonicas constituting a single instrument. Each of them is tuned in different shades always with a fifth interval.