author's note: This article deals with the use of digital recorders. Many investigators in fact prefer to work with analogue, however digital has become the most commonly used format.
EVP or "Electronic Voice Phenomena" can be one of the most compelling pieces of evidence following a paranormal investigation. Getting a solid recording that doesn't sound overly processed on a computer makes for the most credible example. Unfortunately in the field of Paranormal Investigation it seems more often than not, EVP recordings provided as "evidence" by investigators have been overly-manipulated. If the example is plagued with hiss, digital noise reduction (that "warbly" sound), or even worse sounds overly-manipulated, it will not hold an ounce of credibility to the skeptic or even an enthusiastic fellow investigator.

The author's Zoom H2 grabbing some "vibrations" on the infamous Black Mariah Hearse at The Birdcage Theater in Tombstone, Arizona