Simple virtual audio routing tool
BlackHole 2ch by Existential Audio is a free virtual audio driver designed to route sound between applications without physical cables or external hardware. BlackHole 2ch operates entirely at the system audio level, making it useful for recording, streaming, and processing audio across different software tools. Its lightweight design focuses on core functionality rather than visual interfaces, appealing to users who prefer direct control through system audio settings and compatible applications.
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Core audio routing functionality
BlackHole 2ch functions as a virtual audio device that applications can select as an input or output source. BlackHole 2ch enables audio to move cleanly from one program to another using software-based routing managed through system audio tools such as Audio MIDI Setup or within supported audio applications. The two-channel configuration is suited to stereo workflows, offering reliable signal transfer without introducing unnecessary processing layers.
Setup and workflow integration
BlackHole 2ch installs quickly and integrates into standard audio device lists once enabled at the system level. BlackHole 2ch does not include a standalone interface, so configuration relies on operating system audio utilities and the routing options provided by host software. This approach keeps the driver minimal and flexible, but it assumes a basic understanding of audio routing concepts when creating aggregate devices or managing multiple inputs and outputs.
Final thoughts
BlackHole 2ch delivers dependable virtual audio routing for users who need software-only signal flow between applications. BlackHole 2ch focuses on stability and simplicity rather than guided setup, making it well suited to recording, streaming, and monitoring tasks that rely on stereo audio paths. While it lacks visual controls and advanced channel options, its focused design makes it a practical and efficient solution for streamlined audio workflows.
