New Chirp tool uses audio tones to transfer data between devices

Reminds me of this app I've never used but seen that uses audio to transmit images with something called SSTV:

SSTV Encoder (Image encoder for Slow-Scan Television (SSTV) audio signals) https://f-droid.org/packages/om.sstvencoder/

(And also Robot36, I think one encodes and one decodes)