In 1970, aged seven, he entered the well-known music school being already familiar with the notes, having perfect pitch and a sense of rhythm.

Teachers noticed the absolute composing abilities and rare intuition for performing musical composition.

In 1978, aged fourteen, he met Edvard Mirzoyan, the Chairman of the Composers’ Union of Armenia.

2 years later in 1980, Martirosyan would enter Mirzoyan's composition class in the Yerevan Komitas State Conservatory.

In 2014, Martirosyan co-produced the soundtrack for the animated film Anahit alongside Vardan Zadoyan.