The electronic musical instruments to which digital sound technology was applied can be used for early musical education and dissemination of popular songs. It is also applicable to creating and editing musical pieces, connected to computer.

Sobaeksu has 42 kinds of rhythms including 14 Korean ones, 128 kinds of MIDI standard tones and 61 kinds of percussion instrumental tones in its memory.

Several famous Korean songs including "Native Home Covered with White Snow" are recorded in its memory, too.

It can be used in general musical education including sound detection, because it gives clear and correct tones with the help of the PCM digital sound source based on extra-large integration circuit.

Stored in Jangjasan are 33 children's songs, 47 kinds of rhythms including 14 Korean ones, 136 MIDI standard tones and 61 percussion instrumental tones.

As children can practice music on the basis of the musical pieces embedded in it, it greatly helps children learning music.

The musical instruments are good for establishing the Juche character and the national character in the musical education.