The upload button is used by many many guests (lots of people in the audio industry have ready to use audio files on their device): we could hide it but it's a common design pattern you'll find on every recent app (e.g in Whatsapp, Messenger, Signal, etc., you can always use a photo from your gallery or take a new one with the cam).

Still we removed the "Display previous recording" button and we now have only 3 buttons:

Upoad / Record / Options

The microphone is also hidden on mobile as the default one is most of the time the good one.

Having options to be able to toggle what you want on the screen would be handy. As some people get confused with too many options.