ANALOG SIGNAL GENERATION METHOD, ANALOG SIGNAL GENERATION APPARATUS, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a technique for generating a digitally modulated sound signal as an analog signal by pulse width modulation.SOLUTION: An analog signal generation apparatus for reproducing a digital signal into an analog compressional signal includes: an application 201 for reading out a digital signal from a recording medium; means 311 for decoding the digital signal read out into PCM data; a sound signal processor 312 for tuning a PWM fundamental frequency for PWM signal generation to give a low pass filter characteristic for EMI control; and a PWM generator 313 for generating a PWM signal corresponding to the digital signal by using the tuned PWM fundamental frequency. An application level driver constitutes a class D amplifier.