我正在编写语音命令程序。而且我从程序中听不到任何声音，也没有收到此警告或运行程序时不知道的东西。
welcome back bhaskar arya ! i am ready for your command
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:867:(find_matching_chmap) Found no matching channel map
I am ready for your next command