Problem with wakeword demo on Matrix Voice

[nmstoker]

I am having trouble getting the wakeword example to work on my new Matrix Voice.

After receiving the device, I went through the initial installation for Matrix Core [https://matrix-io.github.io/matrix-documentation/matrix-core/getting-started/core-installation/](as described here) and was able to successfully get the Python LED demo working as here.

A few days later I then went to try to wakeword demo here and it ran but did not respond at all to the wake words. I then tried running the LED demo again but found that didn't work.

The only thing I had done in between the original LED demo and wakeword install was to do the apt-get update/upgrade as described in the "Helpful Information" "Upgrading" section of the install page.

I was stuck for a bit but then came across #104 and uninstalled things and reinstalled. The steps worked as intended except the first time I ran sudo apt remove --purge matrixio-kernel-modules it gave an error:

  depmod....

  DKMS: install completed.
  Enable configurations in /boot/config.txt 
  Errors were encountered while processing:
  matrixio-kernel-modules
  E: Sub-process /usr/bin/dpkg returned an error code (1)`

Simply re-running sudo apt remove --purge matrixio-kernel-modules worked a second time.

The only slight change I needed to check the various things were removed was to update this line:

ls /lib/modules/4.14.52-v7+/kernel/drivers/mfd/ | grep matrixio

(ie the current stock kernel - I haven't fiddled with that in any way, it's just what's installed with a regular setup)

By that point the LED demo worked again. However a second go at installing the wakeword does nothing and it seems like there may be some step missing.

Please could you advise if there's anything I should look at to diagnose this?

uname -a outputs:

Linux rpi3Bplus1 4.14.52-v7+ #1123 SMP Wed Jun 27 17:35:49 BST 2018 armv7l GNU/Linux

Thanks, Neil

[eviathan]

I am having an identical problem to this.

Literally everything else is working. Do we need to do some sort of audio configuration?

The c++ recording examples work fine. All the led and sensor examples work fine.

The python wake word one just prints "listening for wakewords and does nothing" (I have generated and pointed it to the dic and lm files).

An odd thing to mention is that if you press ctrl+c and keyboard interrupt it goes onto printing

"^CException KeyboardInterrupt in <bound method Context.del of <zmq.sugar.context.Context object at 0x75e85c30>> ignored Connected to error publisher with port 60005 Connected to data publisher with port 60007"

Which feels like its not connecting till you interupt it. I have also tried spinning up something to pull any data back from 0MQ and nothing.

[Hermitter]

Thanks for the heads up! I've updated the wakeword.py example. The issue seems to have been with how the example was sending its configuration message to the MATRIX CORE Base port. Let us know if the updated example resolves your issue.

[eviathan]

I tried running it and it did get further but it still isn't responding to the wakeword.

[Hermitter]

@eviathan can you try running ps aux | grep malos on your Raspberry Pi? The output should be something similar to what I've pasted below.

root       518  0.1  0.8 665764  7872 ?        Ssl  17:15   0:00 /usr/bin/malos
root       519  0.0  0.6 130744  5768 ?        Ssl  17:15   0:00 /usr/bin/malos_wakeword
root      1042  0.0  0.0   1900   404 ?        S    17:16   0:00 sh -c malos_psphinx -keyphrase "" -kws_threshold 1e-20 -dict "/home/pi/python-matrix-core-app/1339.dic" -lm "/home/pi/python-matrix-core-app/1339.lm" -inmic yes 2> /dev/null
root      1044 24.0  1.3  15720 12916 ?        S    17:16   1:43 malos_psphinx -keyphrase  -kws_threshold 1e-20 -dict /home/pi/python-matrix-core-app/1339.dic -lm /home/pi/python-matrix-core-app/1339.lm -inmic yes
pi        1135  0.0  0.0   4372   580 pts/0    S+   17:23   0:00 grep --color=auto malos

If the malos_wakeword or malos pshinx processes aren't running, try reinstalling them with

sudo apt install matrixio-malos-wakeword

[eviathan]

It was installed but that gave me enough information to fix the problem. Thank you.

[Hermitter]

Glad to be of help. @nmstoker are you still having trouble getting the wake word demo to work?

[nmstoker]

I'll give the latest update a go. Been away, so haven't had time to check it yet but thanks for looking into it.

On Mon, 23 Jul 2018, 22:38 Carlos Chacin, notifications@github.com wrote:

Glad to be of help. @nmstoker https://github.com/nmstoker are you still having trouble getting the wake word demo to work?

— You are receiving this because you were mentioned.

Reply to this email directly, view it on GitHub https://github.com/matrix-io/matrix-creator-malos/issues/111#issuecomment-407209758, or mute the thread https://github.com/notifications/unsubscribe-auth/ADhflO0ap1CD5bUss0GjIYmbTW28Vgonks5uJkJvgaJpZM4VGq14 .

[Hermitter]

Since there hasn't been any activity in the past two weeks, I'll be marking this issue as closed.

[nmstoker]

Hi @Hermitter - sorry for delay. I'm having a look now, but I see no reference to malos_psphinx in my process list. How is that meant to be started (none of the steps I went through via the main documentation indicated I need to start it, but perhaps it's triggered by the wakeword.py script somehow?)

[nmstoker]

Some more info since the above... If I try running malos_pshinx using the equivalent of the command from the process list I get an ALSA error.

I try this:

malos_psphinx -keyphrase "" -kws_threshold 1e-20 -dict "/home/neil/matrix-voice/9017.dic" -lm "/home/neil/matrix-voice/9017.lm" -inmic yes

And after a load of config/start up info, I see

INFO: malos_psphinx.cpp(168): malos_psphinx COMPILED ON: Jun 5 2018, AT: 17:00:53

ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card Error opening audio device default for capture: No such file or directory FATAL: "malos_psphinx.cpp", line 105: Failed to open audio device

I had't done anything with ALSA settings before, it was a fresh install of Raspbian and there wasn't anything mentioned in the installation (right??)

[Hermitter]

Hey @nmstoker

After installation, the Wakeword & PocketSphinx processes should be running automatically on boot. You don't need to edit the ALSA settings.

One possibility for the issues you're encountering is if an error occurred during the installation process. I recommend starting from a fresh Raspbian Stretch image and installing MATRIX CORE & then MATRIX Wakeword.

If you're interested, we also provide a setup guide for installing the Snips.ai offline voice assistant.

Let us know if you have any more questions or are still experiencing issues with the MATRIX Wakeword installation.

[nmstoker]

I'll have a go as you suggest, but I'll need to finish it off tomorrow evening (it's late here now!).

Thanks a lot for your help! I wonder if there's something about your installation steps that depends on the standard "pi" user being present? Changing that to another username is the only significant thing I'd done to my install (beyond the necessary stuff like setting the wifi details, hostname, enabling ssh). And are there any issues using Jessie Lite?

[Hermitter]

Due to the MATRIX Kernel modules being built for Raspbian Stretch, Installing them on Raspbian Jessie will not work.

Are you using Raspbian Jessie for this installation? If that's the case, starting from a fresh Raspbian Stretch installation should fix the issues you're encountering.

[nmstoker]

Sorry, my bad, I meant Stretch Lite! Was Stretch Lite before too :smile:

[Hermitter]

Almost thought we found the issue you were having!

Yes, both Raspbian Stretch Lite & Desktop are compatible. I just tested this today from a fresh Stretch Lite installation. I didn't change the "pi" user, but that shouldn't have affected this installation process.

As a precaution, check the final console logs for each command you use to ensure the dependencies installed correctly.

[nmstoker]

It worked! (I pushed on with it tonight rather than get half way and miss a step!)

I did have to run through the Python getting started steps too (to get the necessary modules) https://matrix-io.github.io/matrix-documentation/matrix-core/getting-started/python-installation/ but that was obvious.

Am unsure what the difference could have been - I suppose that something done during the period when the code wasn't working may have had some lasting effect. I agree that the user "pi" seems an unlikely cause.

One funny aspect is I have to put on a US accent to avoid my British "matrix start" being interpretted as "matrix stop" but I'll experiment with the sphinx settings (or get a voice coach! :wink: )

Thanks again!

[Hermitter]

No problem. Glad to hear you got everything working!

If you still feel like you need a voice coach after experimenting with PocketSphinx, the Snips.ai guide I mentioned previously could be a cheaper alternative.