Ubuntu FreeDV USB audio settings

[JH0PCF kanda]

Thank you for your continued support.

This time, I would like to ask you about the sound device settings of Ubuntu when running FreeDV on Ubuntu.

Especially about the setting of the USB audio codec used for connecting to the wireless device.

Ubuntu does not recognize USB audio codecs

What is done with the configuration file to make it recognized?

Also when you build FreDV locally

(Operation without installing on a computer)

On the radio side of the sender setting in the FreeDV audio setting

The USB audio codec may not be displayed.

To ensure that FreeDV software works

Is there anything I can do? From the repository

With the downloaded FreeDV software Ver1.4.2,

Sound settings Sender tab Radio side USB audio

On the radio side of the sender setting with the locally built FreeDV audio setting

When the USB audio codec is not displayed

It is recognized normally with the same sound device settings.

[Mooneer Salem]

Hi Kanda,

Do you happen to run PulseAudio on your machine by any chance? Your observation sounds similar to what was discussed over on GitHub (https://github.com/drowe67/freedv-gui/issues/16). There's also a test patch in that issue that forces use of a particular PortAudio pull request (adding PulseAudio support) which may solve that problem. Let me know if that's the case for you.

Thanks,

-Mooneer K6AQ

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[JH0PCF kanda]

Thank you for your comment

Install Ubuntu 20.04 LTS again

in etc / modprobe.d / sound.conf

options snd_hda_intel index = 0

options snd_usb_audio index = -2

And set the USB audio codec

Make settings for recognition

In /etc/pulse/client.conf

autospawn = yes to no

as daemon-binary = / bin / true

Remove what was commented out

Enable the setting to see how PulseAudio works

Set to stop and restart

After that, as git clone freedv-gui.git

When I built it, the settings were as expected

I'm done, just with the volume of the FreeDV microphone

Headphone volume can be adjusted with pulseAudio volume control

Can't it be adjusted?

2021年4月20日火曜日 17:30:47 UTC+9 moo...@gmail.com:

[Mooneer Salem]

Hi Kanda,

It should be possible to change both microphone and speaker volumes using the "pavucontrol" application. The patch in the previously mentioned PR does not provide an easy way to indicate which source and sink corresponds to which device, however, so it may require some experimentation. I'm currently working with the PortAudio team to provide a mechanism for us to rename the sources/streams FreeDV use.

Thanks,

-Mooneer K6AQ

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