Using an audio generator involves feeding electrical signals into your body; safety is critical:

The holy grail for many users is "Audio-to-Stim." Generators analyze the beat, bass, and treble of your favorite music and convert it into stimulation. Sex to the rhythm of a drum solo or the build-up of a trance track creates a synesthetic experience where you feel the music.

Disclaimer: This article is for informational and educational purposes regarding signal generation for personal use. Always consult a medical professional before engaging in electro-stimulation, and never use these devices if you have a pacemaker or heart condition.