"Estim 2B audio files" are specifically designed audio signals used to control erotic electrostimulation units, specifically dual-channel units like the E-Stim Systems 2B. While a standard music file aims to move a speaker cone to create sound waves, an estim file aims to send a precise sequence of electrical pulses to electrodes attached to the body.
Think of it like a 2D drawing for your nerves. The left channel draws on electrode set A, the right channel draws on electrode set B. When these waveforms sync, they create "tri-phase" effects that standard modes cannot replicate. estim 2b audio files