Clarify demo instructions by specifying audio file format as mono

Add detailed documentation for Random Vocal Effects Generator

Add requirements.txt with necessary dependencies

refactor app.py

Add .pyc files to .gitignore

add preset binary files

manually copy part of the diffvox source code

Remove diffvox submodule and associated configuration

Add .gitignore to exclude .vscode directory

Implement initial version of demo website

Add submodule for diffvox repository

initial commit