| 摘要 |
PROBLEM TO BE SOLVED: To provide presence by arranging a musical tone into soft or hard tone in a digital signal processor, such as DSP for digital signal processing. SOLUTION: An A/D converter 3 converts an analog signal from an LPF 2 into a digital signal, while a digital signal processor 4 generates audio signal level data for each frequency component from that signal and outputs them to a control part 9, and graphic equalizing control is performed through the internal processing of the digital signal processor 4, corresponding to a graphic equalizing control the signal from the control part 9, and that audio signal is converted into an analog signal by a D/A converter 5, passed through an LPF 6 and a power amplifier 7, and outputted from a loudspeaker 8. |
