2. How to Connect Audio on iPad with...

How to Connect Audio on iPad with the UDS-7IN1 Docking Station

Last Update: September 26th, 2025
Article ID: 3516035

Summary

This article explains how to route audio from an iPad to either the 3.5 mm audio jack or the HDMI port on the Plugable UDS-7IN1 docking station. These steps apply to iPadOS 26 and earlier versions that support USB-C audio.

Requirements

  • iPad with a USB-C port (iPadOS 16 or newer recommended)
  • Plugable UDS-7IN1 docking station
  • For 3.5 mm audio: wired headphones, earbuds, or speakers with a 3.5 mm plug
  • For HDMI audio: a display with built-in speakers or audio-out
  • USB-C power adapter (optional, recommended for charging during use)

Instructions

Route audio through the 3.5 mm audio jack

  1. Connect the iPad’s USB-C power adapter to the rear USB-C Power Delivery port on the UDS-7IN1.
  2. Connect the iPad to the To Host USB-C port on the right side of the dock.
  3. Plug headphones or speakers into the 3.5 mm combo jack on the dock.
  4. On the iPad, swipe down from the top-right corner to open Control Center, then tap the AirPlay icon (a triangle with rings) within the media controls widget.
  5. From the list of outputs, select the dock’s USB audio device (listed as USB Audio Device).
  6. Play music or a video to confirm sound is coming from the headphones or speakers.

Route audio through the HDMI port

  1. Connect the iPad’s USB-C power adapter to the rear USB-C Power Delivery port on the UDS-7IN1.
  2. Connect the iPad to the To Host USB-C port.
  3. Attach an HDMI cable from the dock’s HDMI port to your display.
  4. On the display, set the correct HDMI input and ensure volume is up.
  5. On the iPad, swipe down from the top-right corner to open Control Center, then tap the AirPlay icon (a triangle with rings) within the media controls widget.
  6. Select the HDMI display (it may show the display’s model name).
  7. Play music or a video to confirm audio is routed to the display speakers.

Known limitations

  • Communication apps (FaceTime, Skype) may ignore the 3.5 mm selection and instead route audio to built-in speakers or Bluetooth.
  • The 3.5 mm port is a combination headset jack. While CTIA-standard 4-pole headsets are supported, not all apps recognize microphones.
  • iPadOS supports only one audio output at a time. If both HDMI and the 3.5 mm jack are connected, you must choose one in Control Center. 

Troubleshooting

  • No sound (3.5 mm): Ensure the USB audio device is selected in Control Center. Fully insert the audio plug. Disconnect and reconnect the dock if needed.
  • No sound (HDMI): Verify the display input and volume. In Control Center, confirm the display is selected. If the monitor lacks speakers, connect external speakers to the monitor’s audio-out.
  • Headset mic not detected (3.5 mm): Use a CTIA-standard headset. If still not recognized, use the iPad’s built-in mic or a Bluetooth headset.
  • Low or inconsistent volume: Check volume. Check Settings > Sounds & Haptics > Headphone Safety to ensure USB audio output isn’t limited.