I'm trying to make FM synthesis mimic a particular sound but I find it very difficult to search for something that even approximates the sound I'm looking to emulate (an elephant's roar). Do you have any tips?

Edit - from the comments I found this paper which looks promising

https://ccrma.stanford.edu/~cc/vox/smac2013som/upho2013.pdf

Which also leads me to this paper by Chowning himeself from 1980 titled 'Computer synthesis of the singing voice' which uses FM synthesis.

https://www.speech.kth.se/music/publications/kma/papers/kma2...