Emulator: WARNING: unexpected system image feature string, emulator might not function correctly, please try updating the emulator.
16:45 Emulator: Unexpected feature list: DynamicPartition GLDirectMem HostComposition MultiDisplay RefCountPipe VirtioInput VulkanNullOptionalStrings YUV420888toNV21 YUVCache
16:45 * daemon not running; starting now at tcp:5037
16:45 * daemon started successfully
16:45 Emulator: audio: Failed to create voice `goldfish_audio_in'
16:45 Emulator: qemu-system-x86_64.exe: warning: opening audio input failed
16:45 Emulator: audio: Failed to create voice `adc'
解决方案： 选择Emulator比当前 API 版本低一个版本当前API-29 Emulator-28,，我市64系统的，不要选择Google APIs(新手海不知道为啥)完美解决
运行显示效果
2019/12/28
19:12 Emulator: dsound: Could not initialize DirectSoundCapture
19:12 Emulator: dsound: Reason: No sound driver is available for use, or the given GUID is not a valid DirectSound device ID
19:12 Emulator: dsound: Attempt to initialize voice without DirectSoundCapture object
19:12 Emulator: dsound: Attempt to initialize voice without DirectSoundCapture object
19:12 Emulator: audio: Failed to create voice `goldfish_audio_in'
19:12 Emulator: E:\java\sdk\emulator\qemu\windows-x86_64\qemu-system-x86_64.exe: warning: opening audio input failed
19:12 Emulator: dsound: Attempt to initialize voice without DirectSoundCapture object
19:12 Emulator: dsound: Attempt to initialize voice without DirectSoundCapture object
19:12 Emulator: audio: Failed to create voice `adc'
19:13 Emulator: Process finished with exit code 0
这是声音没有设置，网上有大把，不列解决方案了
来源：CSDN
作者：xiangjiang1105
链接：https://blog.csdn.net/xiangjiang1105/article/details/103747619