Textline mobile and desktop Notifications should, by default, make a sound when they pop up. If you see the Notifications come in correctly but do not hear a sound, you’ll want to check your device’s settings.
Make sure that your device has the audio on & the volume up.
On a mobile device, ensure that the ringer & alerts volume in the sounds section is turned up adequately.
Double check the Notification settings of the Textline app on the device to ensure that Sounds are turned on for Textline Notifications.
Please note that on a mobile device, if the app is currently open, Notifications will not make a sound - they will only sound if the app is in the background or the device is locked. This is a function of mobile push notifications.