If you want to create QRcode from your speech, qrvoice is a free web service that will help you to create QRcode from your voice. No sign up or download is required for using this service.
For creating code simply go to qrvoice speak your message then you will get QRcode and unique URL. You can download this code and share it. Receiver gets a URL they can scan the message and listen it. It will support most languages in the world.