Apple’s proprietary M4A audio format has become a more common type of file upload from presenters since the beginning of the pandemic. Examples are easy to find in the world of ePosters, where presenters upload a .PDF file with the ePoster and an audio track to narrate the ePoster. With this in mind, we’ve changed our Media Type selection from only “MP3” to “AUDIO” (shown below), which allows both MP3 and M4A files to be uploaded under the “AUDIO” umbrella. We believe adding another file type under AUDIO will be helpful for presenters uploading their audio files to cAdmin.
To add an M4A file type:
1. Go to Settings > Media Items
2. Click Create a New Media Type
3. Fill in the media type information and click the AUDIO File Type (shown below)
4. Click Save.
While M4A files have gained popularity, they are unfortunately not supported by all browsers across desktop and mobile devices. Accordingly, all M4A files are automatically converted to the MP3 format, since MP3 is supported across all browsers.
NOTE: The other acceptable file types within Settings > Media Items include:
– PPTX
– PDF
– MP4
– AUDIO (MP3 and M4A)
– IMG – any image file will be accepted, complete image list here: https://www.iana.org/assignments/media-types/media-types.xhtml#image