ZenCast doesn’t restrict what kind of audio files you can upload, and we don’t do any conversions or change your episode file behind the scenes. However, not all audio file types are compatible with all platforms and devices. 

We recommend the following file attributes for the best compatibility and listening experience:

  • MP3

  • Mono

  • CBR (Constant Bitrate)

  • Encoded at 96 kbps, 44.1 kHz and 16 bit

Researching online, you'll find plenty of discussions about what file formats give superior sound quality for the size of the file. All of these debates aside, MP3 is the most widely compatible audio file type across multiple devices and platforms, and that should be regarded as a top priority when you're trying to reach as many listeners as possible. It's no good having the world's best audio quality if huge chunks of your audience can't play the file.

There is no size limit on the audio files you can upload to ZenCast, although we recommend keeping each upload/episode under 100 MB to make it easier on listeners using a mobile connection. In most cases, each listener downloads the same size file that you upload to ZenCast, so users on a slower connection won't appreciate having to wait for gigabytes of audio to fill up their device storage.

If you need to swap out the audio of an episode you already uploaded in the wrong format, check out our help article on how to replace episode audio files.

Still confused about audio settings? Talk to us in the chat bubble or email hello@zencast.fm