For the last few weeks I've had a new dspod on the bench that's based on the STM32U3C5CIT6 MCU. This is a low-power device with some unique new features. I've posted the hardware and firmware sources on Github along with some design notes here:

https://github.com/emeb/dspod/tree/main/dspod_u3c5

This includes driver test code for all the on-board resources including the HSP hardware signal processor and the ADF PDM-PCM filter peripheral. There's also a skeleton of a simple GUI-based multi-effects application.