E-stim 2b Audio Files Guide

| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | No sensation, but levels move | Source volume too low | Increase device volume to 80%; ensure cable fully seated | | Sharp, stinging sensation | Distortion (clipping) in file or source | Reduce source volume; test a known clean file (e.g., 100Hz sine wave) | | Only one channel works | File is mono or cable is faulty | Test with stereo test tone; swap left/right channels in software | | Intermittent cutouts | Background apps sending notifications | Enable “Do Not Disturb” on your phone; use airplane mode | | Feels weak despite high 2B level | File’s amplitude is low (peak < -12dB) | Normalize the file in Audacity (Effect > Normalize to -1dB) |