Ten years ago, finding a high-quality electro+stim audio file was a challenge. Users had to create their own via tedious manual waveform drawing. Today, a vibrant ecosystem has emerged:
"Audio stim" is the practice of using specially crafted audio files—typically in MP3 or WAV format—to control the intensity and rhythm of an electro-stimulator. Instead of relying on a device’s built-in modes, the stimulator "listens" to the audio signal. electro+stim+audio+files
You can find curated playlists and downloadable archives across several major platforms: Music and merch tagged e-stim on Bandcamp Ten years ago, finding a high-quality electro+stim audio