Audio Inspector is the best solution for keeping track of audio sources in your scenes and audio clips in your project.
Some core features include:
» Finding audio sources in your current selection or all loaded scenes.
» Changing audio sources priority, volume, mixer groups and other properties.
» Preview all audio clips in the project.
» Apply different options and presets on audio clips to ensure correct import settings.
Full source code is included with the package. Documentation can be found here.