Because of the niche nature, you won't find these on Spotify. The best resources are community-driven.
Estim Wav files, also known as Estim wav files or simply Wav files, are a type of audio file format used to store and play back audio data. The term "Estim" is likely a misnomer or variation of the more commonly used term "WAV" (Waveform Audio File Format). Estim Wav Files
: You typically connect your audio source (phone/PC) to your stimulator's "Audio In" port using a 3.5mm stereo cable . Because of the niche nature, you won't find these on Spotify