In the Virtual Bat Detector mode, BatSound is used to replay the sound files (time expanded or recorded in the high-speed mode) from the hard disk as heard through a heterodyne bat detector. An on-screen tuning control is available to tune the Virtual Bat Detector to different frequencies. While the signal is being replayed, the spectrogram of the signal is displayed on the screen, making it easy to understand the connection between different sounds and their spectrograms.
This feature is very useful to learn to recognize the sounds of different bat species. The sounds can be repeated over and over again, to facilitate finding the specific characteristics of each species.