John Hays posted an issue on the qdv github, listing several problem, the most serious was that audio wasn't working on Raspbian. After investigating, I found out that qdv not only depends on alsa (asound), it also depends on pulseaudio. On my Ubuntu development system (a System76 Kudu), pulseaudio is installed by default. This is not the case with the Raspberry Pi.

So now the README.md file has a short section on how to install pulseaudio on Raspbian. Buster, the latest version of Raspbian, is a prefect platform for qdv. The full version is very friendly and easy to configure, with a GUI interface to all critical Raspberry Pi configuration parameters. There's no need to use sudo raspi-config anymore!

The Raspberry Pi 3 or 4 has plenty of horsepower to easily run qdv. And the four USB ports are prefect, one each for a wired mouse and keyboard, a USB-headset and the Northwest Digital ThumbDV(tm).

BTW, I still consider qdv to be in alpha release. I have observed some infrequent problems where qdv has to be restarted.

Tom N7TAE

I loaded your program on a new RPi 4 - 4GB that is running the latest Raspbian OS.? Looks like everything is OK except for multiple reports of a humming sound on my signal.? I am using a Logitech USB headset.? I plugged the headset into a USB2 and USB3 port on the RPi and got the same results.?

Any thoughts?
Cal
N9KO??

开云体育

Any chance the humming is coming from a bad filter capacitor in a power supply?

Jeff VE6DV

Which audio device did you select? Did you try any other?

Hi Cal,

If you installed pulseaudio on your Pi and selected the default ALSA device as instructed in the README.md file, you should see both a "default" device as well as your specific headset in the new device selection for the audio input and audio output on the Settings Dialog. I'm asking if there is any difference between using "default" setting or the setting for your Logitech headset.

Earlier, you left a message on the "sound card selection is working" thread saying you re-installed and qdv was working great. Did the humming start later?

Tom N7TAE

I followed your instructions for the RPi install.

There are no differences between the default setting and the Logitech setting.

The "sound card selection is working" is related to a different thread for my installation on a laptop running Ubuntu 18..04

SOLVED? It seems the humming was due to my Logitech H390 USB headset.? I tried my BT/wireless H800 headset.? Could not get the H800 to be recognized by the Audio Device Settings when I was using BT.? Everything worked when I inserted the wireless dongle into the RPi and selected the wireless dongle optin on the headset.? No hum!!!