Fix: Update librosa.feature.rms() to latest API

This commit fixes a bug where `librosa.feature.rms()` was not working due to an API change in librosa. The function now requires the y keyword argument to explicitly specify the audio signal, rather than accepting it as a positional argument.

The change updates the function calls across the codebase to librosa.feature.rms(y=...), ensuring that the RMS energy calculation works correctly with the latest version of the library.

Author: MLsound