Sound is weak and muffled

# The sound is very weak and muffled.

How do I make it loud and clear?
Compare to generated **wav** files it pales in comparison.

The issue names no file, test, or entry point. Begin by locating the code that produces or plays the generated WAV audio, then compare its output with the reported WAV files; done means identifying and correcting the cause of the weak, muffled sound and verifying that the result is louder and clearer.

Written by the indexing model from the issue text.