I used to do that with an MP3 slicer and put it on my early phones which was indeed cutting edge back then. I always remember people being amazed by my ringtones. Lol, the memories indeed! Then indeed there started to be many shitty apps that did it for you, although the first ones were quite shady.

My brother has the Bod themetune as his ringtone AND his notification tone and it is really fecking annoying.