This chromatic chordal lap organ has a four-octave range. Sounds are produced in different ways.
Major or minor triads, thirds and imperfect fifths can be played by blowing through a flexible tube at an apex between three tubes or an edge between two. This will produce a very soft sound and a feeling of dizziness.
The more grunge-inclined can induce tuned feedback by placing a microphone at the flat end and turning up the volume. At the right level the mic will only feed back when in contact with the tubes. The noise will stop when you take it away. Two or more mics can be used.
Notes can also be produced by hitting the ends of the tubes with flat strips of rubber or the hands and fingers.
Fine tuning and portamento can be obtained by shading the far end of the tubes with the palm of the hand, or any device of your own devising. I can make no guarantees about the quality of the music!
Finally, it is a chromatic Aeolian harp, which you can just leave in a windy spot and listen to the soft sounds while you sip green tea in the garden.
I have posted an image showing the layout of the tones, called the Honeycomb mapping, where the same frequency ratios occur at 12, 2, 4, 6, 8 and 10 o'clock from any note. And in fact at all the other o'clocks too.