Install Sunday Keys and download the required MainStage sounds
1. Download and install Sunday Keys
Download Sunday Keys from My Purchases on SundaySounds.com, then double-click the installer. Close MainStage before you run it.
Download keeps failing? Use a strong internet connection, close other apps, and keep your browser window open and in front while it downloads. If Safari has trouble, try Chrome. Still stuck? Contact us.
"Modifying CST Folder requires an administrator name and password"? You can skip this step. It only installs channel strips for Logic Pro and doesn't affect MainStage. To make the folder yourself, create a folder called Channel Strip Settings in Music > Audio Music Apps.
2. Download MainStage's sounds
Sunday Keys uses MainStage's own Sound Library, so you'll need it installed for everything to sound right.
- In MainStage, choose MainStage > Sound Library > Download All Available Sounds.
- When it finishes, restart your computer so MainStage sees the new sounds.
- Reopen Sunday Keys.
Short on space? Download only the categories you need. Open MainStage > Sound Library > Open Sound Library Manager and install everything shown here. This list covers every Sunday Sounds MainStage product.
"Some additional content is needed for this concert"
This MainStage message can keep appearing even after you've downloaded everything. Don't rely on it. Open the Sound Library Manager as above and make sure everything in the list is installed. Then the message should stop.
If a Patch sounds different than you expect later on, check the Sound Library Manager again.