These are the only loopback plugs designed and manufactured specifically for loopback testing of audio ports and headset connectors, built using the circuit specifications outlined by Google.
The plugs can be used to meaure round-trip latency and autocorrelation with software such as OboeTester.
If your PC or Android device has no audio port, the plug can be paired with a USB-C to 3.5mm audio adapter for testing (adapter not included).
OboeTester is a free and open source software that can be used to measure device latency and glitches on Android devices when paired with PassMark's Audio Loopback Plug.
OboeTester can be downloaded directly from the Google Play Store. Alternatively, it can be built within Android Studio. For a guide on how to download and run OboeTester within Android Studio, view the Specifications Page.
Utilizing the Sound Test in BurnInTest, the loopback plug can be used to measure the distortion between audio input and audio output.
Results are displayed as comparison waveforms, providing a visual indication of distortion across both the left and right channel.