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.
This is fantastic! So fun to see!
Chip
Oh Wow! You are a wire wrapper!
I use that technique for some prototypes too. It is amazingly quick and easy.
Nice power supply bodge too. Way to go!
It’s been while!
I would like to add a Sparkfun 320x240 Color Touchscreen to my project.
In my current setup, the standard Teensy 4.1 SDI/SDO/SCK pins (10–13) are free. I think these pins were used to connect the external Tympan AIC board to a Tympan hearing aid.
I’m wondering if there would be any conflict between the display and the Tympan AIC Shield or Tympan code library if I use these pins for the display?
The display documentation says the ILI3941 display works well with Teensy 4.1, using the connections shown in the table below with alternate pins if there are conflicts.
