ALSAエラーを処理する方法

Pythonで音声をテキストに変換する非常に単純なサンプルコードを使用すると機能しますが、次のエラーと警告ストリームが発生します。

Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ALSA lib pcm_dsnoop.c:567:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1000:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2675:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2675:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2675:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib pcm_a52.c:1001:(_snd_pcm_a52_open) a52 is only for playback
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib pcm_dmix.c:1000:(snd_pcm_dmix_open) unable to open slave
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
...

2> / dev / nullを使用してプログラムを起動すると、この問題を抑制できます。しかし、これは良い解決策ではなく、ALSAの設定に問題があるようです。

これはArch Linuxであり、ALSA設定に対して何もしませんでした。私が使ったすべてのソフトウェアでオーディオを完全に録音し、オーディオを出力します。

alsa-mixerには2つの「サウンドカード」があります。

Nvidia GPU 9a HDMI/DPである「HDA Nvidia」は、私が実際にオーディオに使用するわけではありませんが、私の「（デフォルト）」です。 「HD-Audio Generic」は、私が実際にオーディオ入出力に使用するRealtek ALC892です。

サンプルコードは次のとおりです。

# Python program to translate
# speech to text and text to speech
 
 
import speech_recognition as sr
import pyttsx3 
 
# Initialize the recognizer 
r = sr.Recognizer() 
 
# Function to convert text to
# speech
def SpeakText(command):
     
    # Initialize the engine
    engine = pyttsx3.init()
    engine.say(command) 
    engine.runAndWait()
     
     
# Loop infinitely for user to
# speak
 
while(1):    
     
    # Exception handling to handle
    # exceptions at the runtime
    try:
         
        # use the microphone as source for input.
        with sr.Microphone() as source2:
             
            # wait for a second to let the recognizer
            # adjust the energy threshold based on
            # the surrounding noise level 
            r.adjust_for_ambient_noise(source2, duration=0.2)
             
            #listens for the user's input 
            audio2 = r.listen(source2)
             
            # Using google to recognize audio
            MyText = r.recognize_google(audio2)
            MyText = MyText.lower()
 
            print("Did you say ",MyText)
            SpeakText(MyText)
             
    except sr.RequestError as e:
        print("Could not request results; {0}".format(e))
         
    except sr.UnknownValueError:
        print("unknown error occurred")