Used File:Shikwasa audio player.png which is a screenshot of the open source Shikwasa audio player which could be used for this.
These are section headers of Cosmology. The currently playing section is in bold. When tapping on a section header, the audio jumps to it.
Above could be a button to see the article itself and various other things like a button to bookmark or even the media file closest to the currently read text (static images). At the bottom it could display refs & tags for whatever is currently read (probably difficult to implement).
This is just to communicate the general idea and things could be improved once things work to some degree (the current audio player in the Wikipedia is entirely outdated lacking even basic jump back x seconds button and the Commons app can't play audio files at all.)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue
Captions
Rough outline of how the proposed spoken Wikipedia player could look like in the Commons app and the Wikipedia app