Frequency/Audio signal processing

*This is not a report kind of research. No intro, body, conclusion required*

I am asking for a list of signal processing features for  an audio based graph.

For the audio graph, list as much signal processes with a brief description and why it’s important for audio based graphs.

I am currently working on a project where I have an audio and a frequency based graphs that I require to process their signals. I need to find and know how to apply the signal processing tools for the audio graph so that I can analyze it further.

Again, this is not a report kind of research. I only require a LIST of audio signal processing features please.