The sound was 'indistinct' [='faint'] at first, then gradually became louder.
Her voice could only be heard 'indistinctly'. [='faintly']
a far-off 'indistinct' light
(..) Hey, I know this great place where we can... All: No! Y'all, I think I'm gonna call it a night. [Indistinct shouting in distance] Hi, there, boy. Sorry it took me so long. I would have come sooner if I'd known you were sick. (..)2002 Sweet Home Alabama
(..) is going to be all over this. Happy couples don't sell. So if there are any skeletons in her closet, Andrew, we need to know about them. [Indistinct talking on police radio] You make clothes, right? I design them. There's a big difference. Did you design anything (..)2002 Sweet Home Alabama