SoundPipe creates virtual audio devices that let you wire any app’s output, or a microphone, into any other app’s input — system audio into a recorder, a mic into a DAW, several sources mixed into one video call. What separates it from BlackHole or Loopback, tools in this category that are normally either fiddly to configure or expensive, is that installing the audio driver is a single click with no Terminal or Audio MIDI Setup involved, and routing runs under 15ms of latency with per-channel volume sliders on a visual wiring diagram. It’s a $10 one-time purchase, usable on up to 3 Macs.