Audio

Sdrberry needs an external USB audio device to function correctly as a transceiver. To check the status of the audio devices you can use aplay. The build in headphone adapter or an output only audio card will also work, but the transmit functionality is then switched off. (Also for wsjtx).

pi@pi2:~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
  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 3: Device [USB Audio Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Select in the setup page the USB Audio Device (or other audio device of choice)

To test the audio device you can generate a tone

ffplay -ar 48000 -f lavfi -i "sine=frequency=1000" -nodisp

edit sdrberry_setting.cfg with prefered device

[Audio]
device = "USB Audio Device"