"He must know how to play an instrument, how to record music in a studio, and must have even experienced giving concerts. Otherwise, he would only be a good carpenter," Shajarian told MNA.
He went on to say, "During the past 50 years of my career, I have done much research; I was not merely a singer. I always studied different instruments, watched them carefully and reviewed all their positive and negative points.
"For years now, wherever I may go and in each country I visit, I pay a visit to two shops; flower shops and music shops. I look at the instruments, play them and determine their characteristics," he added.
In his early speech at the House of Music Celebration, Shajarian talked about the role of skin in a musical instrument, a topic which provoked widespread criticism.
"It is wrong to say the body of an instrument like tar plays the major role. The body acts like an amplifier, the strings are the vocal cords and then comes the skin," he continued.
"An instrument maker must first draw his design and afterwards make the instrument. He must know the relationship between the components of an instrument, and also must know the roles and functions of each component.
"To recognize sound is a profession in itself, and the instrument maker must have the ability to recognize what kind of sound he means to produce via his instrument and must learn how to produce it as well," he explained.
"Some might say that Shajarian would be better off to pursue his singing, but I am not merely a singer. I make instruments as well," he declared.
Shajarian designed the instrument called a Sorahi that he introduced during one of his concerts in October.
Resembling a kamancheh, a sorahi is a treble instrument from the family of bowed string instruments and sounds similar to a violin. The Sorahi can be offered in ranges of alto, soprano, bass and double bass. Musicians who play kamancheh, qeijak, violin and violoncello can easily play the Sorahi.
Shajarian is also working on two more instruments that he has named the Saghar and the Barbad.