Signal processing circuit for audio apparatus

A signal processing circuit for an audio apparatus wherein a user sets a selected volume level, said signal processing circuit comprising:

• an audio apparatus output adjusting section for setting said selected volume level;
• a variable gain amplifier placed in a signal line for amplifying an input signal to output an amplified signal, said variable gain amplifier having a gain adapted to be varied in accordance with a gain controlling signal supplied thereto;
• a gain setting section having a plurality of tables of input-output characteristics for said variable gain amplifier;
• an input signal level detector for detecting a level of said input signal;
• and
• a table selecting section, responsive to a volume setting signal supplied from said audio apparatus output adjusting section, for selecting one of said plurality of tables of input-output characteristics in accordance with said selected volume level of said audio apparatus, wherein a selected input-output characteristic is supplied from the selected one of said plurality of tables of input-output characteristics to said table selecting section in accordance with an output signal from said input signal level detector, said table selecting section supplying said selected input-output characteristic to said variable gain amplifier so as to set said variable gain amplifier for a gain corresponding to said selected input-output characteristic.