A reverb effect has made a short sound feel more spacious. You want less of that effect, but there are several controls and they do different jobs. Turning down the mix is not the same experiment as shortening the decay.
If you already have an audio tool with a reverb effect, use a quiet, short sound of your own for this exercise. Save a working copy and keep playback comfortable. No particular product or purchase is required.
Find the two controls in the documentation
A dry/wet mix combines the unprocessed signal with the effected signal. Decay concerns the duration of the reverberant tail. The Ableton Live 11 reverb reference describes these as separate controls, although other tools may use different labels or arrangements.
Check the manual for the effect you are actually using. A preset name such as “large room” is a starting setting, not a complete explanation of every parameter or proof of a real recording location.
Change the mix while keeping the tail setting
Play the short sound with a modest effect amount, then reduce the wet contribution without changing the decay setting. Listen for how clearly the original attack stands apart from the surrounding sound.
Leave a gap between playbacks so the previous tail does not overlap the next attempt. If you make notes, record the two settings. Avoid deciding that the version which seems louder is automatically the more interesting one.
Change duration as a separate question
Return to the first mix setting. Now shorten the decay and compare again. Ask how long the aftermath remains audible and whether the next sound has more space around it. Your listening impression depends on the source and the effect, so there is no single correct setting for this exercise.
Finish by choosing one version for a reason: a clearer attack, a longer trail, or a particular sense of distance. Pair it with a tiny collection of original sounds if you want another source to try. Keeping the experiments separate makes your choice easier to understand than moving several controls at once.