General Guides For Audio Clip Usage

Can someone make like a sticky or something regarding best practices with all these audio clip settings...

there are 3 load types:
decompress on load
compressed in memory
streaming

what's the best for 1 long music clip VS a split second gunshot clip playing hundreds of times a minute VS clips that play a handful of times a minute.

what's the benefits of each compression format regarding the above 3 scenarios?
PCM vs vorbis vs ADPCM

and what is this sample rate stuff, how does it affect quality vs compression?

if i have a small game with less than 20 different sounds is it cool to have it all at highest quality? probably still good to test on device right?

any assistance is very helpful.

 

As a general rule, I only run at most 1 streaming sound at a time (music usually).
I make all sound effects non-compressed (they play with much less latency: something like 25-50 times less). I'm not sure if "decompress on load" is that, or not. I would prefer an option of "do not compress" but maybe you're only showing the options for compresed files?