Speech Recognition not finding the QBO's microphone

SrKleRMT

(@srklermt)

New Member

Joined: 5 years ago

Posts: 2

Topic starter 28/05/2019 3:34 pm

Hi,

I am trying to setup the QBO for speech recognition using Python3's speech_recognition library but seem to have stumbled over a hurdle which I can't get over as of yet. I am trying to find at least one of the in-built microphones using the speech_recognition's function:

sr.Microphone.list_microphone_names()

But it is returning the following output:

Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.front

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.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround21

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround40

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround41

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround50

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround51

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.surround71

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.iec958

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline

ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'defaults.bluealsa.device'

ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory

ALSA lib conf.c:4996:(snd_config_expand) Args evaluate error: No such file or directory

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM bluealsa

ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'defaults.bluealsa.device'

ALSA lib conf.c:4528:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory

ALSA lib conf.c:4996:(snd_config_expand) Args evaluate error: No such file or directory

ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM bluealsa

ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card

Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924

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

Microphone with name "bcm2835 ALSA: IEC958/HDMI (hw:0,1)" found for `Microphone(device_index=0)`

Microphone with name "dmix" found for `Microphone(device_index=1)`

The underlined being the two microphone devices it found but upon further inspection, I found out that these are sound output devices which obviously do not suit my needs as I need to take voice input.

Upon further research online I found that the microphone required is called: 'dmicQBO_sv'. Is there a way to find it or do I need to install anything to make it work?

P.S. I am running on Python 3.5.2 and have the latest versions of speech_recognition and PyAudio installed. Moreover, I have upgrade to the latest version of Raspbian available right now.

P.S.2 I have tried my code on another QBO device and the microphone mentioned above was still not found.

Thanks in Advance.

Quote

SrKleRMT

(@srklermt)

New Member

Joined: 5 years ago

Posts: 2

Topic starter 29/05/2019 9:04 am

Ok, small update. It appears that the issue is being caused by the fact that we are updating the Raspbian OS with:

sudo apt-get update

sudo apt-get upgrade

Because as it comes out of the box, the robot can find the required microphone. The only issue being that when I attempt to install opencv-contrib-python for Python3, it is failing with the error dreaded Could not find a version that satisfies the requirement ... error. Do you know how I can get the microphone to work on the latest Raspbian OS version or how to install OpenCV for Python3 on the out of the box version of Raspbian?

Thanks in Advance.

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Qbo Robot

(@nonogrub)

Member Admin

Joined: 8 years ago

Posts: 185

29/05/2019 9:19 am

Posted by: SrKleRMT

Ok, small update. It appears that the issue is being caused by the fact that we are updating the Raspbian OS with:

sudo apt-get update

sudo apt-get upgrade

Because as it comes out of the box, the robot can find the required microphone. The only issue being that when I attempt to install opencv-contrib-python for Python3, it is failing with the error dreaded Could not find a version that satisfies the requirement ... error. Do you know how I can get the microphone to work on the latest Raspbian OS version or how to install OpenCV for Python3 on the out of the box version of Raspbian?

Thanks in Advance.

Hi,

this is how you can access to the microphones:

import serial
import QboCmd

#Get mics present RMS values 0 - 32767: 0 - 1V

par_list = HeadCtrl.GetHeadCmd("GET_MIC_REPORT", 0)
if response:
    mic1_rms = (par_list[1] << 8 | par_list[0]) / 32767.0
    mic2_rms = (par_list[3] << 8 | par_list[2]) / 32767.0
    mic3_rms = (par_list[5] << 8 | par_list[4]) / 32767.0

#Switch to mic 1

HeadCtrl.GetHeadCmd("SET_MIC_INPUT", 1)

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Speech Recognition not finding the QBO's microphone

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