It seems as though the latest Buster release (May 2020) is assigning Card 2 to the USB sound card that we all love to use. Previous to this release, it has always assigned Card 1 to the USB sound card. This will likely break the packet modem in Pat Menu & Build-a-Pi. I am going to try to correct this for release candidate 3. If you are running the latest Buster and the packet modem is not working, run the following command:
arecord -l (note: last letter is lower case L)
Look at the line that begins with "Card". The number following card is the number we need. If it is 1, you are good. If it is 2 then open your direwolf.conf file found in your home directory and look for the following line. It should be around line 70
ADEVICE ?plughw:1,0
and change to read
ADEVICE ?plughw:2,0
Save, exit, and reboot. Please leave a comment below if you were having this issue and if the above directions corrected it.
For those having packet/ardop modem issues and running Pat Menu 2, I have added a new feature that will correct the settings for the packet & ARDOP modems. See this page for instruction
km4ack