Given the task definition and input, reply with output. In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

Erno Lendvai (February 6, 1925 January 31, 1993) was one of the first music theorists to write on the appearance of the golden section and Fibonacci series and how these are implemented in Bartok's music. He also formulated the axis system, acoustic scale and alpha chord. Question: Erno Lendvai (February 6, 1925 January 31, 1993) was one of the first music theorists to write on the appearance of the golden section and Fibonacci series and how these are implemented in Bartok's music, he also formulated the axis system, acoustic scale and alpha chord, an octatonic scale is any which number note musical scale? Answer: eight
He also formulated the axis system, acoustic scale and alpha chord.