PassMark Software - Audio Loopback Cables
![PassMark Software - Audio Loopback Cables](https://www.passmark.com/source/img_posts/big_audio-loopback-view-1-hires.jpg)
Audio loopback cables for testing and troubleshooting your PC sound card
![](https://www.passmark.com/source/img_posts/big_serial-computer-hires.jpg)
PassMark Software - Serial (RS232) and Parallel Loopback Plugs
![](https://europe1.discourse-cdn.com/steinberg/optimized/3X/d/0/d0d0f1a82b2700a8ea6d4162e809819287eab723_2_517x180.png)
Feature Request - Separate Audio Interfaces - Nuendo - Steinberg Forums
![](https://amazingtech.com.cn/product_images/uploaded_images/usb3-loopback-test-plug-slide-1-1.png)
PassMark USB 3.0 Loopback Plugs - amazing
3.5mm stereo plug to connect to the audio port of your PC or Android device for loopback testing.
![](https://evision-webshop.eu/media/04/65/df/1676584236/audio_loopback_plug_hires.jpg)
Passmark Audio Loopback Plugs
![](https://manuals.plus/wp-content/uploads/2022/02/PASSMARK-SOFTWARE-PM125-USB-Power-Delivery-Tester-Copy.png)
PASSMARK SOFTWARE PM125 USB Power Delivery Tester User Guide
![](https://www.passmark.com/source/img_posts/audio-loopback-plug.png)
PassMark Software - Audio Loopback Plug
![](https://www.passmark.com/source/img_posts/audio_loopback_plug_hires.png)
PassMark Software - Audio Loopback Plug
![](https://www.computercablestore.com/content/images/thumbs/0020829_isdn-pri-loopback-tester.jpeg)
ISDN (PRI) Loopback Tester
![](https://www.passmark.com/source/img_posts/big_usb3_loopback_test_angle_hires.jpg)
PassMark Software - USB 3.0 Loopback Plugs and USB Test Software
![](https://www.passmark.com/source/img_posts/audio-adapter.png)
PassMark Software - Audio Loopback Plug