Do them in this order... Big exception to his instructions... use the settings in the post above... (I use left audio connector)
"For a DRAWS hat left = gpio 12, right = gpio 23. Make sure that direwolf is NOT running."

./piardopc 8515 plughw:1,0 plughw:1,0 -p GPIO=12

(if you don't put plughw:1,0 in twice, you will get an error)

Added this to .asoundrc
ref: ARDOPC.txt

pcm.ARDOP {
type rate
slave {
pcm "hw:1,0"
rate 12000
}
}

Install Winlink on Raspberry Pi 4 Part 1 2019 (also applies to a 3)  https://www.youtube.com/watch?v=oZJJLfVz23k

Install Winlink on Raspberry Pi 4 Part 2 2019  (only first bit, he tells you where to stop for DRAWS)  https://www.youtube.com/watch?v=BgqsTbxzR4E

THEN

Pat Winlink on DRAWS  https://www.youtube.com/watch?v=LnJQv6rDpss

Final thoughts are I had to really crank up the output volume from the default to get any radio output.

127.0.0.1:8080 on your Pi or 'ip_address':8080 on networked computer to start the Web GUI "DRAWS Manager" to set your audio levels.

For me on an FT-857 the radio displays ALC levels, and I have an power meter connected to show the radio ouput wattage...I dial up the digital volume in the "DRAWS Manager" bit by bit until the ALC level is at the 3/4 mark (example in your radio manual) and output power should be close to what was set on the radio.

But I did log into a winlink station, send and receive email over HF, all while using a networked computer's web browser.

So for me, it is working 100%

Mike
KF5DEY