I am working with he buildozer. and it is never easy to find the good solution.
I do not know pyaudio exactly. But I am using any other special modules.
Many things can cause the problem.
- the module is good for your original python app but not good for converting apk. (look for another, similar module, if it is possible)
- something is missing for this module (the other module, or upgrade)
But here I would try first:
I suppose you use any wav, mp3, or any other audio file in your kivy, python app, but this extensions are missing in this row:
# (list) Source files to include (let empty to include all the files)
source.include_exts = py,png,jpg,kv,atlas
I think the ChatGtp can show some way to find the final solution faster.