AudioImporter.forceToMono 强制到单声道

// Import files containin "mono" in their name as mono.
//导入文件名称中包含mono，将作为单声道

class DetectMono extends AssetPostprocessor {
	function OnPreprocessAudio () {
		if (assetPath.Contains("mono")) {
			var audioImporter : AudioImporter = assetImporter;
			audioImporter.forceToMono = true;
		}
	}
}