If used as a source for research paper this passage would be considered and the answer to this one is a primary source

the question is what makes it a primary source

What makes a primary source, a primary source?

Ex) You're researching a person to write a biography about that person. A primary source for information could be that person, their diary, etc.

A primary source provides direct or firsthand evidence about an event, object, person, or work of art.

1. The sound of the shakuhachi is deeper and deeper compared to the sound of the western flute.

2. It has the ability to be divided into three octaves on a five note scale.

3. The Japanese aesthetic quality that can be heard in the piece is the "ma", the "okua-den" lineage and the silence that can be noticed between the beats and the breath.

Explanation:

The shakuhachi is a wind instrument very popular in the east and very similar to the European recorder. It is made of bamboo and has a very simple appearance, with only a mouthpiece and 5 holes, but it has a great versatility which allows it to be used in many different genres. This versatility occurs thanks to its deep and raw sound that can be divided into three octaves and five-note scale.