It can sometimes be helpful to listen to both the ThoughtStream's internal audio and other audio content, such as relaxing nature sounds, guided meditations, and the like. Though the ThoughtStream does not have an audio input jack, it turns out that the solution is a simple one. All you need is a stereo audio splitter (1/8" plug to 2 1/8" stereo jacks) and an audio patch cord, such as the one included with Proteus and Procyon. Just plug the splitter into the ThoughtStream audio output, ...