How to make organ books

The practice of organ books is as follows:

First, fold the quarto paper in half along the long direction, then fold it in half respectively, and then fold it in half after looking out to form a W-shape. All the papers folded into a W shape are bonded at the ends with scotch tape. In turn, use glue sticks to coat both ends of the connected origami and stick kraft paper. Pay attention to the alignment between the spine and the inner page. Finally, make decorations or notebook straps according to personal preferences. The organ book is finished.

Organ, which makes a group of free reeds vibrate by air pressure to produce sound. The wind source comes from a pair of agitating bellows operated by pedals, and the sound quality is similar to that of an organ. There is a sound plug above the keyboard to change the timbre, which can be adjusted at any time.

Broadly speaking, the organ is a musical instrument. No matter what kind of organ it is, its sound principle is the same. Organ is a reed instrument, which uses some kind of power (mechanical or human, etc.). Let the air flow through various sound tubes of different lengths to make music.

In a narrow sense, the appearance is similar to that of an ordinary organ in upright piano, which is an instrument played with a two-handed keyboard through a large pedal at the foot. The pedal blows into the air duct. If you don't play, the whole air duct is closed. When a finger presses a key, the sound tube plug of the corresponding key is opened, air flows through, the sound tube is blown, and music sounds are made.