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Troubleshooting System Audio Recording

Recording system audio is a tricky business invovling several components and steps which all must be configured and work properly for system audio to record correctly. When one of these steps or settings isn't set correctly, it can be difficult to figure out why the system audio in saved movies is silent, or why one program's audio isn't being recorded while others are. Read this page to learn about troubleshooting problems with system audio recording in Screenflick.

What is Screenflick Loopback?

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Screenflick uses a system extension called Screenflick Loopback to record system audio on your Mac. What Screenflick Loopback does is create a 'virtual' audio device, which has input and output streams. To record system audio with Screenflick Loopback, the system-wide default audio output device is set to Screenflick Loopback. This directs all audio into Screenflick Loopback's input. Any program can then record from Screenflick Loopback's output, which effectively records the system audio.

Problem: An application's audio is not being recorded

When you start a recording with system audio, Screenflick switches the system audio output device to 'Screenflick Loopback' which Screenflick then uses as an input to record from. Some programs will play over a specific output device rather than always using the current system setting which can lead to problems like this.

It's likely that when you launch the program, it sees that your speakers are the current output device and then internally sets itself to play over those speakers. Then when you start recording with Screenflick, Screenflick changes the system output device setting to the Screenflick Loopback. The program however, may not be watching for the notification that the system output device has changed and will still be playing audio directly to the speakers instead of the Screenflick Loopback like it should be.

The result of this happening, is that while you can hear all audio correctly over your speakers while the recording is taking place, Screenflick Loopback (and thus Screenflick) is not being fed audio from the troublesome program, which creates a movie with missing audio. This can lead to the confusion that it is Screenflick which is failing to record audio, when it is really is really the program playing the audio which is causing the problem.

How to Solve This Problem

What needs to happen is the program playing audio needs to launch after the system output device has already been changed to Screenflick Loopback. There are two ways this can happen.

1. Launch the program which plays the audio after you start a Screenflick recording
2. Before starting the program, go into System Preferences and change the system output audio device to 'Screenflick Loopback', start the program, and then start the recording when you're ready.

The key thing is that the default system output must be set to Screenflick Loopback before the program starts up and plays audio.

There is also a third possibility. In some programs (such as Skype and other programs which focus on audio) there is a preference to specify which audio device to direct audio to. If the program you're recording has one of these settings, you can simply set that setting to 'Screenflick Loopback' when you're making Screenflick recordings.

Problem: My system audio is silent after stopping a recording or quitting Screenflick.

Although this shouldn't happen, the most likely cause is Screenflick Loopback is still selected as the system audio output device. To fix this, simply go into the Audio panel in System Preferences and select your speakers in the device list in the Output tab.