Convert DJVU to WAV

It actually might be possible to transform DjVu Images directly to WAVE Audio Files (.djvu to .wav conversion), since DJVU files are essentially scanned documents. Any attempts to convert those documents to audio format typically relate to users searching for ways to transform texts to speech.

That can be achieved using a text-to-speech software, such as Balabolka or Narrator, which should allow you to transform texts from DJVU scanned documents and export them in WAV format.