TABLE OF CONTENTS

• Supported Audio Format and Quality for HDMI ARC and Optical In
• How to Use the Line In Port
• How to Use the Optical In Port
• How to Use the HDMI ARC Port
• How to Use Audio Input Ports with Multi-room
• How to Select Audio Input
• HDMI ARC Troubleshooting

The WiiM Amp or WiiM Amp Pro features three distinct audio input ports: 

• Line In
• Optical In
• HDMI ARC

You can connect devices like CD players, TVs, PCs, or turntables, to your WiiM Amp or WiiM Amp Pro via these input ports for high-quality playback with approximately 50ms reduced latency.

Supported Audio Format and Quality for HDMI ARC and Optical In

The following table shows the supported audio formats and quality for the HDMI ARC and Optical In ports on both the WiiM Amp and WiiM Amp Pro:

Please note that neither the WiiM Amp nor the WiiM Amp Pro supports other TV audio formats like Dolby Atmos or DTS. 

To ensure proper sound output and compatibility, set the audio format to PCM in your TV or Blu-ray player's settings when using the WiiM Amp.

How to Use the Line In Port

The Line In interface on the WiiM Amp and WiiM Amp Pro is typically used to connect to a CD player or PC to receive analog audio input.

This example shows how to use the Line In port to connect a CD player:

1. Use a RCA cable to connect the Line In port on your WiiM Amp or WiiM Amp Pro to the Line Out port on a CD player.
   
   
2. Select the source input as Line In in the WiiM Home app, or enable Auto-sensing of Line In. For details, see How to Select Audio Input.
   
   
3. Play music on the CD player. The music will stream to your WiiM Amp or WiiM Amp Pro.

Similarly, you can connect other audio device to your WiiM Amp or WiiM Amp Pro via the Line In port in the same process.

How to Use the Optical In Port

The Optical In port on the WiiM Amp and WiiM Amp Pro is typically used to connect to a TV or PC to receive digital audio input.

This example shows how to use the Optical In port to connect a TV:

1. Use an optical cable to connect the Optical In port on your WiiM device to the Optical Out port on a TV.
   
   
2. Go to the TV settings, set your TV's audio output to select your WiiM Amp or WiiM Amp Pro. 
   
   
3. If you are using the WiiM Amp, set the TV's digital output audio format to the Stereo PCM format. For instructions, refer to General Guide to Setting Digital Audio Output to PCM for Various TV Brands.
   
   
4. Select the source input as Optical In in the WiiM Home app, or enable Auto-sensing of Optical In. For details, see How to Select Audio Input.
   
   
5. The audio on the TV will play on your WiiM Amp or WiiM Amp Pro.

Similarly, you can connect other audio device to your WiiM Amp or WiiM Amp Pro via the Optical In port in the same process.

How to Use the HDMI ARC Port

The HDMI ARC port on the WiiM Amp and WiiM Amp Pro is typically used to connect to a TV or PC to receive digital audio input.

This example shows how to use the HDMI ARC port to connect a TV:

1. Use an HDMI cable to connect the HDMI ARC port on your WiiM device to the HDMI ARC port on your TV.
   
   Note: ensure you use the HDMI ARC port on your TV. Other HDMI ports won’t transmit sound to the WiiM devices.
   
   
2. Go to the TV settings, enable the HDMI ARC function and set your TV's audio output to select your WiiM Amp or WiiM Amp Pro.
   
   
3. If you are using the WiiM Amp, set the TV's digital output audio format to the Stereo PCM format. For instructions, refer to General Guide to Setting Digital Audio Output to PCM for Various TV Brands.
   
   
4. Select the source input as TV in the WiiM Home app, or enable Auto-sensing of HDMI. For details, see How to Select Audio Input.
   
   
5. The audio on the TV will play on your WiiM Amp or WiiM Amp Pro.

Similarly, you can connect other audio device to your WiiM Amp or WiiM Amp Pro via the HDMI ARC port in the same process.

If you encounter no sound issues with your TV, refer to HDMI ARC Troubleshooting.

How to Use Audio Input Ports with Multi-room

The WiiM Amp and WiiM Amp Pro supports all types of audio inputs—Wi-Fi/Ethernet, Bluetooth, Line In, Optical In, and HDMI ARC—as sources for your multi-room system. By connecting an audio source device (e.g., a CD player or TV) to your WiiM Amp or WiiM Amp Pro, you can stream audio to any other WiiM devices on the same network. 

This example shows how to set up a multi-room system with the Line In source input:

1. Prepare multiple WiiM devices and connect them to the same network as your WiiM Amp or WiiM Amp Pro.
   
   
2. Connect an audio source device (e.g., a CD player) to your WiiM Amp or Amp Pro via the Line In port. For details, see How to Use the Line In Port.
   
   
3. Select the audio inut source as Line In in the WiiM Home app.
   
   
4. Set up a multi-room system in the WiiM Home app.

1. Go to the Devices tab.
   
   
2. Tap theicon in the upper right corner of your WiiM Amp or WiiM Amp Pro connected to the source device.
   
   
3. Choose other WiiM devices you want to include in the multi-room system.

Now, the audio from the CD player will play on all WiiM devices in the multi-room system.

Similarly, you can follow the same procedure to set up a WiiM multi-room system with any other source input supported by your WiiM Amp and WiiM Amp Pro. 

For more information, refer to How to Stream TV Audio to Multiple Locations using WiiM Multi-room Audio Feature.

How to Select Audio Input

Manually Select Audio Input

To play audio from the connected input, manually select an audio input on your WiiM Amp or WiiM Amp Pro by following these steps:

1. Open the WiiM Home App.
   
   
2. Navigate to the Devices tab.
   
   
3. Choose your device or group where you want the audio to play.
   
   
4. Navigate to the Browse tab, scroll down, and select the appropriate input option: TV, Line In, or Optical In.
   

Automatically Select Audio Input using Auto-Sensing

The auto-sensing feature allows the WiiM Amp or WiiM Amp Pro to automatically play audio from the connected input when a signal is detected, provided the device has been inactive for at least 15 seconds.

To enable auto-sensing, follow these steps:

1. Open the WiiM Home App.
   
   
2. Navigate to the Devices tab.
   
   
3. Tap the Device Settings icon of your WiiM device.
   
   
4. Select Audio Input and enable Auto-Sensing of Optical In, HDMI, and Line In. This feature is disabled by default.
   

By enabling auto-sensing, your WiiM device will automatically switch to the active audio input, offering a seamless and convenient listening experience.

Additional Information on Auto-Sensing

When the auto-sensing feature is enabled and it is streaming music from a Wi-Fi source, the feature will be inactive if any of the following inputs is simultaneously playing music: Aux In, Line In, Optical In, or HDMI ARC.

HDMI ARC Troubleshooting

• When connecting your TV to your WiiM Amp or WiiM Amp Pro via an HDMI cable, ensure you use the HDMI ARC port on your TV or Blu-ray player. Other HDMI ports won’t transmit sound to the WiiM devices.
  
  
• If you experience no sound, ensure that the HDMI ARC output on your TV is activated. For details, see Troubleshooting No Sound Issues with HDMI TV Input on WiiM Devices.
  
  
• If there are control issues between your TV and your WiiM Amp or WiiM Amp Pro, verify that HDMI-CEC control is enabled on your TV.
  
  
• If your TV lacks an HDMI ARC port, connect the Optical Out port of your TV to the Optical In port of your WiiM Amp or WiiM Amp Pro.