Reading a 15KHz sound sample while formatting a floppy on Amstrad CPC by Roudoudou
-Roudoudou has written a ROM to format Amstrad CPC floppy disks which can play a 15KHz sound sample while the formatting.
Also, if you are curious, there is video shohis demo CRTC3 with the debug mode of the CPCEC emulator.
And the bonus video with Roudoudou himself explaining his return on Amstrad CPC is worth its weight in gold, french inside of course but translated subtitles should be interesting for any computer user.