Recording a student’s voice can easily be done with Formative:
With vocaroo.com you can embed the recording with an iframe or send personalized feedback to your students by mail. Or students could send their recordings to you.
I successfully worked with recap, using the chat option for: “Which tips/notes would you give to new high school students?” and the video option for “Greet the new high school students in your native language using the video function”:
Which other recording tools do you use?