In an experimental trial, a melody played in piano timbre is presented.

In the congruent condition, all the tones are members of the musical scale while in the incongruent condition, there is a non-member/incongruent tone embedded in the melody. When there is an incongruent tone, it creates an incongruent pitch interval with the tone before it. Participants’ task was to detect and respond to the tone that has a TS as quickly as possible.