The function used to write WAV files via audioio tried to import the non-existing function audio_writer. Instead, I changed it to write_audio, which exists and works in audioio.
I fixed write_audioio - thank you for spotting this.
I did not change the requirements, because getting audioio from github might be broken. But I released a current version on PypI, so that thunderfish works with the current PyPi version.
I will not accept this pull request, because there are way to many changes regarding the style. In particular, I will stick to strings with single quotes.
The function used to write WAV files via audioio tried to import the non-existing function audio_writer. Instead, I changed it to write_audio, which exists and works in audioio.