I do it far more with words and phrases than with sounds; sometimes a phrase will just catch my interest and I'll repeat it to myself over and over again. Tonight I've been repeating a line from a film I just saw for several hours; "Jeffy highly functioning developmentally disabled." It means nothing to me, I just like the way the words sound when run together. When I'm around other people and they bring up topics of conversation that remind me of lines from things I've seen or read, I'm compelled to repeat them, even though I know this probably comes across as very strange. If I'm by myself and bored, I can recite entire monologues and movie scenes to myself, as a means of preoccupation. For a highly verbal person, I use a lot of other peoples' words.
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"Survival is insufficient" - Seven of Nine
Diagnosed with ASD level 1 on the 10th of April, 2014
Rediagnosed with ASD level 2 on the 4th of May, 2019
Thanks to Olympiadis for my fantastic avatar!