use RhysLees\NovaAudio\Audio;

public function fields(Request $request)
{
    return [
        ...
        Audio::make('Audio')
            ->disk('public'),
        ...
    ];
}

Nova Audio extends Nova's built-in File Field so you can use the same options the come with Nova's File Field. In addition, Nova Audio has a few extra options:

    /**
     * Preloads the audio for instant playback.
     */
    ->preload($value = 'auto')

    /**
     * Instructs the field to autoplay the audio.
     */
    ->autoplay($value = true)

    /**
     * Show the playback speed controls for the audio field.
     */
    ->playbackRate($value = true)