I'm trying to add an audio file (mp3) to my Welcome Email on Substack. (not on a post or page, but the actual Welcome Email)
When creating this email, there isn't an option to insert an audio file, so I went to the help/support place. I was told to just drag/drop the audio file into the body of the welcome email and it will insert itself.
So far, it's been 30 minutes and it's not inserting. The file isn't big, 2 minutes, so it can't be the size.
I've been searching Youtube to figure this out and haven't found it.
Has anyone tried to insert an audio file? If so, how did you do it?