I'm interested in multichannel audio.
Last year, I've tested Teensy's TDM capability with the CS42448 audio codec board, which I found here in this forum.
Thank you very much for this great contribution!
While looking further into audio performance and it's application for stand alone sound modules, modular or installative works, I was interested in using active filters for all inputs and outputs.
The CS42448 developer boards seemed to be well documented and I decided to make a layout based on it. From my previous analogue projects I've 8 channel buffers and amplifier modules for further signal conditioning.
When I've found this thread a couple of days ago, I thought that I could share my layout and discuss it here, if someone is interested in.
I still need to double check some footprints and component availability as well as the Teensy connections and the analog and digital ground section. I'm thinking about making a slit in the ground section to separate the digital part. But I'm not that deep into implementing proper grounding in mixed signal designs.
There are already some very nice and thoughtful CS42448/Teensy layouts out here, which consider different applications and, most important, these designs are very elegant and usable. Whereas the layout I did according to the CS42448 developer board is quite big and has a high part count and includes even 402 smd packages. I guess it's recommendable to use a stencil and reflow ofen to build this board.
Nevertheless, it could be interesting for some people.