#Record screen quicktime audio hijack how to#
#Record screen quicktime audio hijack install#
#Record screen quicktime audio hijack driver#
#Record screen quicktime audio hijack full#
#Record screen quicktime audio hijack license#

Unfortunately multi-outputs are pretty buggy and some apps just won't work with them at all.

#Record screen quicktime audio hijack full#

Check to make sure 'Installer' has File and Folder permission and Full Disk Access in System Settings->Privacy and Security.

You need to enable drift correction for all devices except the Clock Source also known as Master Device or Primary Device.

Why is audio glitching after X minutes when using a multi-output or an aggregate?

If you are using a multi-output device, due to issues with macOS the Built-in Output must be enabled and listed as the top device in the Multi-Output. Why is nothing playing through BlackHole?Ĭheck System Preferences -> Security & Privacy -> Privacy -> Microphone to make sure your digital audio workstation (DAW) has microphone access.Ĭheck that the volume is all the way up on BlackHole input and output in Audio Midi Setup. Unfortunately macOS does not support changing the volume of a Multi-Output device but you can set the volume of individual devices in Audio MIDI Setup. How can I change the volume of a Multi-Output device? How can I listen to the audio and use BlackHole at the same time? It only shows up in Audio MIDI Setup, Sound Preferences, or other audio applications.

Sync Clock with other Audio Devices in development see v0.3.0įAQ Why isn't BlackHole showing up in the Applications folder?īlackHole is a virtual audio loopback driver.

To request a features not listed please create a new issue. If you are interested in any of the following features please leave a comment in the linked issue. Take a look at to see how the installer is built, signed and notarized. Continuous Integration / Continuous DeploymentīlackHole can be integrated into your CI/CD. Hidden audio devices can be accessed using kAudioHardwarePropertyTranslateUIDToDevice. That way the user will see an input only device while routing audio through to the output behind them scenes. One way to use this in projects is to hide the mirrored device and use it behind the scenes. One will have inputs only and the other will have outputs only. In this situation we have two BlackHole devices. The devices may be customized using the following constants. Mirror Deviceīy default BlackHole has a hidden mirrored audio device. If using multiple sample rates separate each with a. KSampleRates set the sample rate or sample rates of the audio device. This may be helpful if using BlackHole with a high channel count. It can be used to delay the audio inside of BlackHole up to a maximum of 65536 frames.

#Record screen quicktime audio hijack driver#

KLatency_Frame_Size is how much time in frames that the driver has to process incoming and outgoing audio.

#Record screen quicktime audio hijack how to#

Some applications don't know how to handle high channel counts. 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.

#Record screen quicktime audio hijack install#

To install BlackHole copy the BlackHoleXch.driver folder to /Library/Audio/Plug-Ins/HAL and restart CoreAudio using sudo launchctl kickstart -kp system/.

#Record screen quicktime audio hijack license#

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.