I'm not sure if this is an appropriate question for this site, i apologize if not.
Is there a way that when recording with a digital recorder it would seemingly be recording but somehow block out certain things, ie, voices? While listening to recording it seems that at some points that things will go very muffled yet the volume increases and the "feel" of the audio changes. Sometimes some voices, yet terribly distorted, can be heard but most is completely blocked. Is this possible and if so how does this work and can it be proven? I appreciate any help that someone has to offer.