Here's a dry-run for a talk I gave about three years ago.

These are the slides although I think they were not exactly the same when I gave the talk

 https://www.slideshare.net/Chris_Fry_Barcelona/students-recording-themselves 

The slides go into a lot of detail about the time required by the teacher.

My students were using ipadio at the time, but I hope the same sort of thing can be done with Anchor, Spreaker or SoundCloud.

Of late I've been looking at the idea of getting students to use Padlet and a timeline format to create a repository e-portfolio of all their recordings and a second padlet with the timeline format, too, to display and share their best recordings each week