The antonyms for the word "talked low" would include "spoke loudly", "shouted", "yelled", or "screamed". These words all indicate a higher volume of speech and a more forceful manner of communication. "Chattered", "rattled on", "jabbered", and "rambled" would be other antonyms to "talked low". These words imply a more uncontrolled and chaotic style of speaking. Conversely, "whispered," "murmured", "muttered ", or "mumbled" would be synonyms of "talked low", indicating a softer and quieter method of communication. The choice of words used to describe communication can greatly impact the tone and meaning of a conversation.