What are the recommendable audio file formats?

The Lightcast Web Uploaders - available in your Lightcast.com account - accepts almost all common file types. The list of recommended audio formats can be found on the audio upload page. Please keep in mind that the Lightcast Web Uploaders have a file size limit of 4GB.

More infos on the Web Uploader limits: https://help.lightcast.com/why-does-your-web-uploader-have-a-4gb-limit