1、找到並打開手機中的imovie剪輯app；
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2、進入imovie剪輯頁面後，在項目選項欄中，點擊創建項目；
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3、選擇創建的項目是影片或者預告片，選中並點擊進入相應的頁面中；
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4、在媒體頁面中，點擊並進入視頻選項；
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5、在視頻選項中，找到並點擊要進行添加音樂的視頻，並在屏幕最下方點擊創建影片；
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6、進入到編輯頁面後，點擊屏幕左側中間位置的“+”按鍵，跳轉出添加的功能按鈕；
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7、在功能頁面中，選擇音頻，進入到音頻頁面；
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8、選擇要添加聲音，並點擊使用；
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9、跳轉到編輯視頻頁面，就可以看到增加的聲音，點擊屏幕左上角的完成，即聲音添加成功。
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