Correct Me - Tumblr Posts

Y'know how repeatedly typing 'a' is like scream and repeatedly typing 'z' is showing someone's sleeping? What do the others mean?

What I've gathered (post original post-haha see I'm funny I swear-):

A: Realization (like, 'a(h), okay')/Screaming/Sighing/Voice exercises -Often followed by 'h' rather than itself.

E: Squealing -Like the stereotypical girl squealing? When they see something cute? I don't know.

I: Squealing(?) -I don't know what I'm doing.

M: Gagged/Eating/Humming/Sleepy noises/Surprise/Thinking -Often presented with alternating caps to indicate pitch. Commonly used to portray unintelligible speech.

N: Cute noises/Eating/Humming (rare)/Sleepy noises/Surprise/Thinking -Often used to show satisfaction, usually short and sweet (little sibling of 'm' vibes). It can also be used as a nonverbal response and accompanied with subtle body language (i.e. nodding/clenching of fist/narrowing of eyes/change in facial expression).

O: Interest/Mockery -Often presented with alternating caps to indicate pitch.

R: Growling -Would probably start with a 'g'?

S: Hissing (i guess?)/Snake slithering/Sizzling (like grill) -Often starts with a capital, but is followed by lower case.

T: Symbols???

V: Industrial noises? -Like machine?

Z: Buzzing/Sleeping/Snoring/Static -Often presented with alternating caps to indicate unevenness or proximity.