Electronic musical instrument employing keyboard tonality designation system

Tonality designation of an electronic keyboard instrument is realized by utilizing keys instead of conventional tonality designation switches provided on the panel of its. The tonality designation system comprises a tonality data forming circuit and a memory. The tonality data forming circuit generates tonality data consisting of keynote data and scale data representative of key note and type of scale respectively based on key depression and transfers it to the memory in advance before performance. The memory stores the tonality designation data during performance. A musical tone to be produced is formed or controlled based on the stored tonality data and a depressed key.