Thanks for the link M5, seems like a good tutorial. I haven't even tried learning DirectX coding since I looked at D3D coding with DirectX3 (or maybe it was DirectX5). Anyway, I found it to be a ...

The tutorial covers fundamental digital audio concepts such as waveforms, sampling, bit depth and how sound travels from the air to the computer’s hard drive and back.

Both versions of DirectX are great, but DirectX 12 is the newer version and as such, it comes with feature not found in DirectX 11.