With perfect Halloween timing, SDR enthusiast and ghost hunter Doug Haber has released his RTL-SDR compatible software called “gqrx-ghostbox”. This software supposedly turns your RTL-SDR into a electronic voice phenomenon (EVP) tool a.k.a a “Ghost Box”. Douglas explains what a Ghost Box is in the following blurb:

A ghost box is a device sometimes used by paranormal researchers to talk to spirits, the dead, disembodied entities, shape shifting lizard people, and other intra-dimensional fauna.

Some ghost boxes have electronics that give them distinct properties, and others are effectively radio scanners. This tool is of the radio scanning style.

Many examples of ghost box usage can be found on youtube. Generally, it involves asking questions and then listening for a response. Some people believe a medium or trance state is necessary in order for it to work. If you search for “ghost box” or “spirit box”, you will find information on different usage styles.

We’re not 100% sure if this is a late April fools joke, or a serious tool, but the code is real (it appears to just use GQRX to scan through frequencies), and at least these days when almost everything possible has already been tried with an RTL-SDR, this is something new!