convert_audio_properties
Converts audio file format and ALL specified properties like bitrate, sample rate, and channels. Args: input_audio_path: Path to the source audio file. output_audio_path: Path to save the converted audio file. target_format: Desired output audio format (e.g., 'mp3', 'wav', 'aac'). bitrate: Target audio bitrate (e.g., '128k', '192k'). Optional. sample_rate: Target audio sample rate in Hz (e.g., 44100, 48000). Optional. channels: Number of audio channels (1 for mono, 2 for stereo). Optional. Returns: A status message indicating success or failure.