I finally got my Tympan AIC CODEC Shield wired up to a Teensy 4.1 and running the AudioPassThru example.
Next up is to explore the other code examples and adapting code for my specific hearing loss.
Old school protoboard with wire wrapping.
Surface mount 5V to 1.8V regulator ic bodge.
To build this project I followed → GitHub post
Still very much looking forward to getting my hands on a Tympan Rev E.