I agree with the others. All individuals will sound a little different. Some crow more or less, louder or quieter; some sound majestic, others pitiful, and some are downright annoying, but there is no such thing as a quiet crow. Over the years, I've had many different breeds of roosters, and they all have a slightly different crow. One of my Ameraucanas has a weird rattling sound at the end of his crow. My other Ameraucana has a lower, drawn-out sound, but he rarely crows. My little Seramas had a high-pitched crow that sounded like they were being strangled at the end. My Wyandotte likes to crow often and has a loud, deep voice, and my mutt rooster never makes a sound.
Typically, a bigger rooster will have a louder crow. Smaller breeds will be more high-pitched, but that doesn't mean they crow quieter or less frequently. I would ask any neighbors how they would feel about you getting a rooster and check to make sure it's legal for your area.