STR： 1、Open the clock APP. 2、Add two alarms, and their interval is 1 minute and their sounds are different. 3、Wait for alarm and listen to the sounds. OBSERVED: 4. The first alarm sound does not stop normally, but still exists for a few seconds when the second alarm works. Two kinds of sound are working at the same times for the few seconds. EXPECTED: 9.The first alarm sound does not stop normally when the second alarm works.