Codec2 is an audio compression codec designed for speech. The codec is designed for very high compression ratios. It has bit rates as low as 450 bits per second!!!
I wrote this application to make audio recordings with this audio compressor.
For more information see https://jontio.zapto.org/hda1/jc2rec.html
You will need the codec2 repo cloned into a directory above the jc2rec repo. You'll have to build codec2 and have all the required QT things. On Windows I suggest using MSYS2 to install everything needed.
Jonti
2021