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Don't use high sample rates with a high number of channels. Although BlackHole is designed to be extremely efficient at higher channel counts it's possible that your computer might not be able to keep up. Be careful when specifying high channel counts. KNumber_Of_Channels is used to set the number of channels. GCC_PREPROCESSOR_DEFINITIONS='$GCC_PREPROCESSOR_DEFINITIONSĬustomizing Channels, Latency, and Sample Rates The following pre-compiler constants may be used to easily customize a build of BlackHole. To install BlackHole copy the BlackHoleXch.driver folder to /Library/Audio/Plug-Ins/HAL and restart CoreAudio using sudo launchctl kickstart -kp system/. To request a license contact Existential Audio. Please support our hard work and continued development.

Input audio from the corresponding output channelsĭeveloper Guides A license is required for all non GPL-3.0 projects.

Open receiving application and set input device to "BlackHole".

Set output driver to "BlackHole" in sending application.

Play audio from another application and monitor or record in your DAW.

Open digital audio workstation (DAW) such as GarageBand and set input device to "BlackHole".

In Audio Midi Setup → Audio Devices right-click on the newly created Multi-Output and select "Use This Device For Sound Output".

Sudo launchctl kickstart -kp system/įor more specific details visit the Wiki.

Restart CoreAudio with the terminal command: Note that the directory is the root /Library not /Users/user/Library. Rm -R /Library/Audio/Plug-Ins/HAL/BlackHoleXch.driverīe sure to replace X with either 2, 16, or 64. Uninstallation Instructions Option 1: Use Uninstallerĭelete the BlackHole driver with the terminal command: Installation Instructions Option 1: Download Installer Compatible with macOS Yosemite (10.10) and newer.Customizable mirror device to allow for a hidden input or output.Customizable channel count, latency, hidden devices.Builds 2, 16, 64, 128, 256 audio channels versions.BlackHole is a modern macOS virtual audio loopback driver that allows applications to pass audio to other applications with zero additional latency.