1# Resource Scheduler Subsystem Changelog 2 3## c1.resource schedule.1 Background Application Control Changed 4 5**Access Level** 6 7Other 8 9**Change Reason** 10 11After the continuous task of an audio playback application is stopped, the application still plays audio streams, affecting system running. 12 13**Change Impact** 14 15Applications that use audio resources improperly in the background will be forcibly terminated by the system. 16 17**Start API Level** 18 199 20 21**Change Since** 22 23OpenHarmony SDK 5.0.0.22 24 25**Key API/Component Changes** 26 27Before the change: If the audio stream type is **STREAM_USAGE_MEDIA** or **SREAM_USAGE_UNKNOWN**, the application will be forcibly terminated by the system. 28 29After the change: The system forcibly terminates the application regardless of the audio stream type used by the application. 30 31Change plan: In this version, the log "Audio cannot be used after being frozen. The system will kill the UID" will be recorded. From the next version, the application will be forcibly terminated. 32 33**Adaptation Guide** 34 35To use audio resources in the background, an application must request a continuous task. When it no longer requires the audio resources, it should release the continuous task and audio resources in a timely manner. 36 37For details about how to request a continuous task, refer to the following guide: 38https://gitee.com/openharmony/docs/blob/master/en/application-dev/task-management/continuous-task.md