There is provided a radio device including: a reception unit that receives a radio signal of radio broadcasting; another reception unit that receives a radio signal of IP simulcast radio broadcasting; a calculation unit that calculates a time difference between a broadcast radio audio based on the radio signal received by the reception unit and an IP radio audio based on the radio signal received by another reception unit; a prediction unit that predicts a grace time until switching from the broadcast radio audio to the IP radio audio based on the time difference; another calculation unit that calculates a stretch rate based on the grace time; and a switching unit that stretches the broadcast radio audio using the stretch rate to output an audio until the grace time elapses, and switches to an audio output of the IP radio audio when the grace time elapses.

There is provided a radio device including: a reception unit that receives a radio signal of radio broadcasting; another reception unit that receives a radio signal of IP simulcast radio broadcasting; a calculation unit that calculates a time difference between a broadcast radio audio based on the radio signal received by the reception unit and an IP radio audio based on the radio signal received by another reception unit; a prediction unit that predicts a grace time until switching from the broadcast radio audio to the IP radio audio based on the time difference; another calculation unit that calculates a stretch rate based on the grace time; and a switching unit that stretches the broadcast radio audio using the stretch rate to output an audio until the grace time elapses, and switches to an audio output of the IP radio audio when the grace time elapses.