There’s a new update on the v.23 decoder, there was a major bug on the demodulation routine.
There is a script process_wav_to_data.sh It takes an audio file as the first parameter. It will try to decode the v23 data and split it into files based on pauses in between. Those files will be packed into a zip archive which will be stored next to the audio file.
If you have the bildschirmtext decoder https://github.com/bildschirmtext/bildschirmtext installed next to it, it will also generate preview images.