The TOFIN experimental paradigm consists in a simple task frequently called as multiple choice, oddball or intruder task. The game generates series of tones (by default three). The task of the player is to identify a tone that does not fit in the sequence. Each of the tones has different harmonical relationship to a base note. ![enter image description here][1] The purpose of this experimental paradigm is to further test various theories of tonal hierarchies. User can choose to present the tone series either after a single tone (the base tone) is presented, over the base tone that plays during whole trial, over a chord, or after a chord briefly resonates. The experimental paradigm runs in [Pure data][2]. The statistical analysis of the output variables can be performed using attached [Jupyter][3] notebook. The work on this software was supported by the grant SVV 2020-2022 (260556) realized at the Charles University, Faculty of Arts. [1]: https://files.osf.io/v1/resources/2gt8w/providers/osfstorage/63a1f91a175ccb0106328706?mode=render [2]: https://puredata.info/ [3]: https://jupyter.org/