Product Code PM132
Dimensions Plug length: 52mm ± 0.5mm
Plug diameter: 3.5mm
Conductors 3.5 MM Stereo Plug 4x Conductors
Sheath Material: PVC
Colour: Black
Tools Test Software: OboeTester
Available Tests: Round-trip audio latency and glitch test


These loopback plug connect to the Audio Port of your PC or android device.

Circuit Layout

Audio Loopback Plug Circuit

3rd Party Test Software


Download the top level Oboe Repository from GitHub


  • Android Studio
  • Android device or emulator
  • USB cable to connect your computer and your phone

System Requirements

  • 4 GB RAM minimum, 8 GB RAM recommended
  • 2 GB of available disk space minimum, 4 GB Recommended
  • 1280 x 800 minimum screen resolution

Build and Run

  1. Launch Android Studio
  2. Click Open from the File menu and browse to the "oboe/apps/OboeTester" folder. Select that folder.
  3. Wait about a minute for the project to load.
  4. Connect an Android phone to your computer using a USB cable and connect Audio Loopback Plug to Audio Port.
  5. Look at your phone. You may need to give permission to use ADB on your phone.
  6. Select "Run App" from the "Run" menu.
  7. OboeTester should build and then appear on your computer.
  8. Complete your testing using the Round Trip Latency and Glitch Tests

Update the NDK (Side by Side) under SDK Tools in Android Studio

Additional Resources

Further information on how to use OboeTester's various test activities can be found on GitHub.