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I'm a mumbler. Like a serious mumbler. I think I'm speaking at an acceptable level and when someone says to speak up I I actually feel like I'm shouting. Any ideas, pointers?

That's so interesting because I'm actually a singer (rock n roll) so projection and volume isn't an issue when there's music playing. My diction could always improve haha. But will try to bring my vocal technique into my speaking voice.

Will give that a shot thanks