Can’t get past the 'Verify audio setup' step

[stursby]

I'm trying to get this demo working, but getting stuck at the 'Verify audio setup' step.

I'm running this command --> python -m googlesamples.assistant.audio_helpers

And get the following output:

Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/pi/google-home-pi/env/lib/python2.7/site-packages/googlesamples/assistant/audio_helpers/__main__.py", line 94, in <module>
    main()
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/pi/google-home-pi/env/lib/python2.7/site-packages/googlesamples/assistant/audio_helpers/__main__.py", line 67, in main
    flush_size=audio_flush_size)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/googlesamples/assistant/audio_helpers/__init__.py", line 140, in __init__
    blocksize=int(block_size/2),  # blocksize is in number of frames.
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/sounddevice.py", line 1491, in __init__
    **_remove_self(locals()))
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/sounddevice.py", line 1017, in __init__
    'Error opening {0}'.format(self.__class__.__name__))
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/sounddevice.py", line 2671, in _check
    raise PortAudioError(msg)
sounddevice.PortAudioError: Error opening RawStream: Invalid sample rate

Setup:

• Raspberry Pi 3 (Model B)
• Raspbian Jessie Lite (4.4)
• Adafruit Mini USB Microphone (link)

Any help/tips would be much appreciated! Thanks

[proppy]

Can you paste the content of your .asoundrc and the output of aplay -l arecord -l?

See also:
https://developers.google.com/assistant/sdk/prototype/getting-started-pi-python/configure-audio

[stursby]

@proppy, When I pasted the sample .asoundrc file, playback was failing, so I removed it. So assume I don't have one set. I'm currently using this USB mic and the 3.5mm headphone jack for output.

aplay -l

**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

arecord -l

**** List of CAPTURE Hardware Devices ****
card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Thanks so much for your help!

[oscartprom]

I am using the same setup. According to your output, your /home/pi/.asoundrc file should read:

pcm.!default {
  type asym
  capture.pcm "usb_mic"
  playback.pcm "jack_speaker"
}

pcm.usb_mic {
  type plug
  slave {
    pcm "hw:1,0"
  }
}

pcm.jack_speaker {
  type plug
  slave {
    pcm "hw:0,0"
  }
}

Note the modified lines pcm "hw:card_number,device_number"

[stursby]

@oscartprom Ok, I added that file. It seems to record just fine, however I'm not hearing anything played back when I run aplay --format=S16_LE --rate=16k out.raw.

I do however hear "front left, front left..." when running speaker-test -t wav

And now trying to run python -m googlesamples.assistant gives the following error:

(env)pi@hatch-google-home:~/google-home-pi $ python -m googlesamples.assistant
INFO:root:Connecting to embeddedassistant.googleapis.com
Press Enter to send a new request...
INFO:root:Recording audio request.
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/pi/google-home-pi/env/lib/python2.7/site-packages/googlesamples/assistant/__main__.py", line 273, in <module>
    main()
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/pi/google-home-pi/env/lib/python2.7/site-packages/googlesamples/assistant/__main__.py", line 234, in main
    grpc_deadline):
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/grpc/_channel.py", line 366, in next
    return self._next()
  File "/home/pi/google-home-pi/env/local/lib/python2.7/site-packages/grpc/_channel.py", line 357, in _next
    raise self
grpc._channel._Rendezvous: <_Rendezvous of RPC that terminated with (StatusCode.UNAVAILABLE, Connect Failed)>

[szabodabo]

Hm... if you are hearing audio when you run speaker-test but nothing when you aplay a file, are you sure that the file you're passing to aplay isn't empty? How do you know the recording actually picked up sound?

Is the Connect Failed error persistent? Did it work for you before? Are you running any kind of local or network firewall?

[proppy]

Can you also try that command again after adding the .asoundrc file?

python -m googlesamples.assistant.audio_helpers

[stursby]

@proppy Here's the output from that:

(env)pi@hatch-google-home:~/google-home-pi $ python -m googlesamples.assistant.audio_helpers
INFO:root:Starting audio test.
INFO:root:Recording samples.
INFO:root:Finished recording.
INFO:root:Playing back samples.
INFO:root:Finished playback.
INFO:root:audio test completed.

I do hear a brief second or two of static... what am I supposed to hear?

[proppy]

It's supposed to record something for 5 seconds and then replay it? Does it behave correctly?

[mayankshekhar111]

After reading the comments I changed the .asoundrc file accordingly. Now the mic and playback are working fine.
However on starting the SDK the same error pops up.

Now what to do??

[proppy]

However on starting the SDK the same error pops up.

Can you paste the output of python -m googlesamples.assistant.audio_helpers and comment if it behaves correctly (record 5 seconds of audio and replay them).

[mayankshekhar111]

I'm able to record and playback the audio. No issues. But this error continues

Traceback (most recent call last):
File "/usr/lib/python3.4/runpy.py", line 170, in _run_module_as_main
"main", mod_spec)
File "/usr/lib/python3.4/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/root/env/lib/python3.4/site-packages/googlesamples/assistant/audio_helpers/main.py", line 95, in
main()
File "/root/env/lib/python3.4/site-packages/click/core.py", line 722, in call
return self.main(*args, **kwargs)
File "/root/env/lib/python3.4/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/root/env/lib/python3.4/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/root/env/lib/python3.4/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/root/env/lib/python3.4/site-packages/googlesamples/assistant/audio_helpers/main.py", line 67, in main
flush_size=audio_flush_size)
File "/root/env/lib/python3.4/site-packages/googlesamples/assistant/audio_helpers/init.py", line 179, in init
blocksize=int(block_size/2), # blocksize is in number of frames.
File "/root/env/lib/python3.4/site-packages/sounddevice.py", line 1491, in init
**_remove_self(locals()))
File "/root/env/lib/python3.4/site-packages/sounddevice.py", line 1017, in init
'Error opening {0}'.format(self.class.name))
File "/root/env/lib/python3.4/site-packages/sounddevice.py", line 2671, in _check
raise PortAudioError(msg)
sounddevice.PortAudioError: Error opening RawStream: Invalid sample rate

[mayankshekhar111]

How do I change the sample rate of the audio devices. I believe it should have been set to 16000 Hz as per this page
https://developers.google.com/assistant/sdk/best-practices/audio

[proppy]

--audio-sample-rate flag allow you to control the sample rate, but it should already default to 16000.

I'm able to record and playback the audio.

Can you show past here the command you're using to record/playback audio.

[mayankshekhar111]

Record a short audio clip.

arecord --format=S16_LE --duration=5 --rate=16k --file-type=raw out.raw

Check the recording by replaying it.

aplay --format=S16_LE --rate=16k out.raw