All my efforts have been on the multichannel field recorder project!

Since working on that I have learned a lot more C and understand a lot 

more about micro controllers!

It's quite clear that to make this project work I will need to use DMA with a circular buffer to transfer the samples to from audio codec and radio hardware.

I now know a lot more about DMA since working on the multichannel field recorder project and will re-start this project from scratch either using ESP32 or STM32f7 mico with RF hardware.

For now i'm just to busy on the other project !