This guide will cover several methods of setting up alert tools like Streamlabs and Stream Elements with Wave Link to be able to control the alert audio individually.
This guide is for Windows 10 only.
Method One - Separate Browser
This example will use a separate browser from the main one which will play back the audio of alerts.
1) Open Wave Link
2) Add a new Audio Input. For this example we'll use Aux 1. Once the Aux 1 input is added it can be renamed to Alerts
3) Download and install a browser like Chrome or Firefox, or use a built-in browser like Edge or Safari.
This browser should not be the same one you use daily
4) Open the browser and open the Alert service dashboard which will be used
5) Play a test alert through the browser
6) Open Wave Link again and click on the Windows Audio settings icon at the top right
7) In the Windows Audio settings, find the browser that just played the test alert, and in the left column under output, select Wave Link Aux 1 as the output
8) Go back to the browser and play another test alert. The sound should come through the Aux 1 Alerts input in Wave Link
9) Now, add the alert box as normal to the preferred streaming software
10) This setup is done. With this method, the browser that will be used for alerts needs to be open and on the alert service dashboard page for sound to be captured when a new alert from a follower, subscriber, donation or other alert comes in.
To make this easy, most browsers allow for a start page to be configured that the browser will automatically go to when launched. Set this start page to the alert service dashboard. One click will be required to launch the sound for the alert service.
Method Two - Monitor Output
In this example the streaming software will be OBS Studio
This method will route the alert audio into OBS Studio, then monitor the alert audio out of OBS Studio into Wave Link into an Alerts input channel.
1) Open Wave Link
2) Add a new input and select Aux 1 as the Audio Input. It can now be renamed to Alerts
3) Open the dashboard of the alert service that will be used
4) Copy the alert box link
5) Open OBS Studio
6) Click the + icon under sources or right click in the source box, hover the mouse over add and select Browser
7) Give the Browser source a name. In this case it'll be called Alerts
8) Paste the URL that was copied from the alert service into the URL box in the Browser source properties window
9) Check the box Control audio via OBS
10) Click on OK to close the Browser source properties
11) Right click inside the Audio Mixer panel and select Advanced Audio Properties
12) Find the browser source that was just added and in the Audio Monitoring column and select Monitor Only (Mute output)
13) Now close the Advanced Audio Properties
14) Click on Settings in the Controls panel to open the OBS Studio settings
15) On the left sidebar click on the Audio tab
16) In the Advanced section, click on the Monitoring Device dropdown menu and select Wave Link Aux 1
Make sure Disable Windows Audio Ducking is selected
17) Now click on Apply and OK to close the audio settings
18) Go back to the alert service dashboard, and trigger a test alert. The audio bars for the browser source should move in OBS Studio and inside Wave Link, and if Wave Link is configured you should be able to hear the alert.