A vehicle sound system comprising an engine as a sound source disposed at a given position in the vehicle and an audio device disposed in an internal space of a cabin of the vehicle, the audio device being switchable between a first mode in which an audio sound including both an audible sound and an inaudible sound for a human is reproduced in the cabin and a second mode in which an audio sound including the audible sound but not including the inaudible sound is reproduced in the cabin, the sound system comprising: a traveling state detector configured to detect a traveling state of the vehicle; and a switch controlling module configured by a processor to reproduce the audio sound in the first mode under a condition that a given traveling state is detected by the traveling state detector and to reproduce the audio sound in the second mode under a condition that the given traveling state is not detected by the traveling state detector; characterized by further comprising: an engine sound localizer configured to localize a sound generated by the engine to cause a vehicle driver inside the cabin to hear the sound from a first position; an audio sound localizer configured to localize the audio sound generated by the audio device to cause the driver to hear the sound from a second position; and a localized position controlling module (U 3) configured by the processor to control a distance between the first and second positions, wherein, when the audio sound is reproduced in the first mode, the localized position controlling module controls the distance between the first and second positions so that the first and second positions are set to be closer to each other than when the audio sound is reproduced in the second mode. a traveling state detector configured to detect a traveling state of the vehicle; and a switch controlling module configured by a processor to reproduce the audio sound in the first mode under a condition that a given traveling state is detected by the traveling state detector and to reproduce the audio sound in the second mode under a condition that the given traveling state is not detected by the traveling state detector; characterized by further comprising: an engine sound localizer configured to localize a sound generated by the engine to cause a vehicle driver inside the cabin to hear the sound from a first position; an audio sound localizer configured to localize the audio sound generated by the audio device to cause the driver to hear the sound from a second position; and a localized position controlling module (U 3) configured by the processor to control a distance between the first and second positions, wherein, when the audio sound is reproduced in the first mode, the localized position controlling module controls the distance between the first and second positions so that the first and second positions are set to be closer to each other than when the audio sound is reproduced in the second mode. an engine sound localizer configured to localize a sound generated by the engine to cause a vehicle driver inside the cabin to hear the sound from a first position; an audio sound localizer configured to localize the audio sound generated by the audio device to cause the driver to hear the sound from a second position; and a localized position controlling module (U 3) configured by the processor to control a distance between the first and second positions, wherein, when the audio sound is reproduced in the first mode, the localized position controlling module controls the distance between the first and second positions so that the first and second positions are set to be closer to each other than when the audio sound is reproduced in the second mode.