Volume control of aural guidance of vehicle route guidance apparatus

A vehicle route guidance apparatus which outputs route guidance aurally through only one of a plurality of loudspeakers which also outputs an output signal from an audio apparatus, comprising:

• a voice generation section which generates a guidance voice signal for route guidance through said only one of a plurality of loudspeakers;
• volume setting means being responsive to external operation, for setting a level of said guidance voice signal without changing a level of said output signal from said audio apparatus;
• a circuit change switch for switching an input to said only one loudspeaker between said output signal from said audio apparatus and said guidance voice signal;
• muting means for muting said output signal from said audio apparatus;
• a control section which activates said muting means then switches said circuit change switch to said guidance voice signal when said guidance voice signal is to be output through said only one loudspeaker, so as to mute said output signal from said audio apparatus to said only one loudspeaker before said switching of said circuit change switch without muting said output from said audio apparatus to said plurality of speakers except said only one loudspeaker.