Manually Adjusting Audio

Hi. I can't seem to figure out how to do this. Is there a way to adjust the clip audio without having to make a key frame mark? As in, if I want the volume in a clip to be down to -4, but when I click on the volume line and pull it down, it only goes to -3.74 and then it skips to 5-something or other. So is there a way to actually type in what volume I'd like it be at. It's very strenuous having to click and ever so gently drag when I feel like there's probably an easier way to set the volume. Thanks very much.