Real time audio synthesis

Hi Guys!

I am relatively new to Unity but I am using it for a project regarding audio synthesis.

For the project I am have a player try and find a invisible object emitting sound to help with location.

For the project I am trying to alter the sound the closer the player is to the object.

So far I am able to obviously change the loudness of the sound and also the pitch, however I am interested in synthesis methods such as pulse (like a car parking sensor) or modulation of the audio the closer the player gets.

I cannot seem to find any way to do this with the base level of Unity, however I have seen people use SuperCollider for audio engines and was wondering if people have any recommendations to going about this project?

Thanks in advance!