How to change default playback and recording device names in Windows?

In Windows when a recording device plugged in, the device alias name becomes "Microphone", but I want it "M" for new devices. By default I want it like this:

Not like this:

Also the same thing is necessary for playback devices, I want them with default alias as "S" instead of "Speaker".

How can I change it for all new plugged devices. When I change it for a device, its alias changes, but I want to change it for newly plugged ones.

Perhaps it might be somewhere in regedit, but I can not find..