Portable cellular phone

摘要

A portable cellular phone includes conversion means 104 for converting a voice signal entered from a microphone 103 into a digital audio signal; computation means 105 which obtains musical scale information by extracting from the digital audio signal frequency components corresponding to a musical scale and which generates and outputs a musical scale signal from the musical scale information; and drive means 106 for driving an audio output device 107 on the basis of the musical scale signal. A user can input a desired musical scale without involving key operations.