Traditional moseños used to be made of local bamboos from South America, as Aulonemia queko, tuned in ritual scales. At their local Aymara area, moseños are made in various sizes, depending the age of the player. It is traditionally played in high overtones.

Once spreaded in a broader Latinamerican area,the main feature of the moseño is the lateral tube, which acts as a long wind channel that makes it easy to play. It is side-blown, but the sound is produced by a fipple instead of a transverse embouchure. Also, the way as it is played in folk and other music groups has changed, becoming a sort of bass flute.

Nowadays, we build this instrument with very selected pieces of  Phyllostachys aurea, an extraordinary bamboo from the Delta, Argentina.
We take care of the storage and selection of each culm to make our flutes.

Moseño in G3 (86 cm) and in C4 (64 cm)
Note: We heve changed the word moxeño for "moseño", considered more correct. It is still used as sinonimus in Argentina. Anyway, you can find this instrument called as "mocenio" or "mosenio" in other places

Due to their great size, moseños might be demountable,
in the same fashion as a Bass recorder.
To make the chromatic scale easier, we have developed a special fingering (see the picture) . It also has two keys at the foot end

Equal to the traditional quena, our
moseños in D4 and C4 have 6 holes on the front and one on the back (6-1 system), then obtaining a whole octave by direct blowing. Overblowing you can get the whole second octave and some notes of the third.
For bass moseños we have designed another fingering system: using the index and ring finger and the thumbs (2-1-2-1 system). This method allows almost everybody to reach the longer tonehole distances of long moseños.
Sharps and flats can be played either by cross fingering (as in the recorder) or by half-holing (as in the quena)