That's right. DAB is digital over AM, but there's another much more exciting technology called DRM (Digital Radio Mondiale) that uses the SW bands to deliver 72

That's right. DAB is digital over AM, but there's another much more exciting technology called DRM (Digital Radio Mondiale) that uses the SW bands to deliver 72kbps (currently HE-AAC but xHE-AAC in the future) over the Shortwave Bands. This has the potential to make use of very efficient transmitters with very long range. The encoding and bitrates are comparable to DAB+. https://en.wikipedia.org/wiki/Digital_Radio_Mondiale https://en.wikipedia.org/wiki/Digital_Radio_Mondiale