Place them in a sequence that mimics a story (e.g., a slow warm-up, building intensity, and a rhythmic climax). :
There are several reputable libraries where you can download or stream these files: E-Stim Audio Files estim sound files link
Many mid-range and DIY estim devices (such as the popular "StereoStim" or various 2-channel boxes) function as . Instead of generating a specific internal waveform (like a medical TENS unit), these devices take an audio signal from a computer, phone, or MP3 player, amplify it, and send it to the electrodes. Place them in a sequence that mimics a story (e