Software Update checks now occur only after the Welcome Window has been closed. When the full version of Loopback has been unlocked, the “License” window now subtly shows the application's version number.įussy typography improvements have been made to the mailing list sign-up window shown at the fifth launch for new users, as well as the “Release Notes” window shown at the first launch of a new version, which you might be looking at right now! CPU usage has been reduced in many common audio flows, clock synchronization across devices has been improved, and persistent device tracking has been improved.Īn issue where upsampling of certain low sample rates could sometimes produce audio artifacts has been resolved. Tracking of audio device sample clocks also now works better when the device is providing erroneous information. This includes a workaround for issues with FaceTime volume when using the built-in microphone, as well as an improvement in dealing with poorly implemented Audio Units. Improvements in ACE 11.8.2 The Audio Capture Engine (ACE) has been updated to 11.8.2, with many improvements for even more reliable audio capture. If you're still on 10.14 (or lower), be sure to see our Legacy Software page. ![]() Loopback now requires MacOS 10.15 (Catalina) or higher. If the “Check for Test Releases” hidden preference is enabled, checks will now run regardless of the status of the “Software Update” preference/setting. On MacOS 13 (Ventura) and up, Loopback’s “Preferences” window is now called “Settings”, to match the new MacOS convention. On Ventura, this audio can now be captured on a per-application basis by targeting the application where the text is being spoken. Further enhancements to all volume sliders in Loopback are planned for the future.ĭue to changes made by Apple, the “Text to Speech” special source is no longer available on MacOS 13 (Ventura). Meters will no longer report invalid levels when their target device’s sample rate is changed.Ī rare channel mapping issue with certain devices which could result in coreaudiod instability has been corrected.Ī logic issue has been fixed to prevent clock desynchronization when a device clock resets.Īttempting to change volumes by selecting a volume knob then manually typing in a new value no longer causes an internal error. Improvements in ACE 11.9 The Audio Capture Engine (ACE) has been updated to 11.9, with compatibility for MacOS 13 (Ventura) and many improvements for even more reliable audio capture. Thanks.Initial MacOS 13 (Ventura) Compatibility Loopback now has initial compatibility with MacOS 13 (Ventura), with no known issues. However, if you have any trouble with the filter please contact me and I will be glad to help. Which did include both a Windows 7 and Windows 8 machine. My solution has only undergone a very small amount of testing. The result is a significantly lighter CPU footprint. This eliminates the usage of the extra threading and BAD sleep statements in the code. I sync the Reference clock to use the clock time specified by the AudioCaptureClient. ![]() This will allow the filter graph to continue to process video frames/mux even if there is no audio. I generate silence values into the buffer when there is “No” data available from the AudioCaptureClient. There are a few major differences in my filter from the one I was using before. I have removed most of the source that was not needed for my filter to make it easier to understand. I based my filter off the Synth Audio Source, from the directshow example projects. This problem is magnified in directshow by not allowing your filter graph to process any video unless there is valid audio (ie silence will pause your graph). The main issue with these works, is the inability to generate “silence”. but the filter graph would pause if there was silence (no audio). I also submit a patch that fixed the audio in windows 8. I found that in Windows 8 the filter no longer worked on this project. ![]() His work and all the comments containing some of the issues with the code are located here.Īdditionally “Roger Pack” wrote the original directshow filter wrapper for Maurits code. ![]() This code is based on the initial work done by “Maurits” at Microsoft. A feature that has been added since Windows Vista. The code is based on Microsofts IAudioCaptureClient running in “loopback” mode. This project provides an efficient working audio capture source filter. Microsoft SDK (Direct Show base classes) Overview Directshow Audio Loopback Capture Filter Dependencies
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