line in and out using a 2$ interface from ali express.
add this to .bashrc
#record and playback
alias record="arecord -D plughw:2,0 -f s16_LE -c 1 -r 44100 -V mono test.wav"
#top right usb port if it matters
alias playback="aplay -D plughw:2,0 test.wav"
using iphone lightning to headphone adapter to plug in the aux. Input and output can't record at the same time but it shows a VU meter in the terminal so you can see if you're getting levels.
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