In my mind it will always and forever be the CD-ROM drive, but any drive added to a standard Windows system (including partitions) will just continue the alphabet from C. So if you install a second hard drive (or partition your only one) it will become D, the next one will be E, and so on:
I’ll leave it to someone else to convey this in a biblical fashion.










They go through this in the video. The frequencies in question overlap with large portions of the vocal range, so not very practical. They also show that it’s pretty easy to recreate the data even when it’s attenuated.