| 摘要 |
PROBLEM TO BE SOLVED: To automate a process of setting predetermined amplification gain, in relation to a sound signal processing circuit for converting a reception digital sound signal to an analog sound signal to be output, and to provide a method of processing an output level setting. SOLUTION: This application provides the sound signal processing circuit 1 for receiving and inputting a digital sound signal to be converted to an analog sound signal of a predetermined level to be output, and the method of processing an output level setting. The sound signal processing circuit includes: a D/A conversion means such as a D/A converter 5 for converting a digital sound signal to an analog sound signal; a gain-variable amplifier means including an attenuator 6 and an amplifier 7 for controlling the level of the analog sound signal converted by the D/A conversion means within a specified value according to a control value; and a structure configured to previously measure the control value for controlling the gain of the variable-gain amplification means to be stored in a storage means such as a memory 8. COPYRIGHT: (C)2011,JPO&INPIT
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