You can change key and tempo in the PianoTrax app on your mobile device.
1. Choose the track you want to edit from the “My Tracks” folder
2. Click "Edit" (3 dots or pencil on paper icon)
3. A menu will appear to change key and tempo

If you need a downloadable Mp3 in a new key or tempo, we can make it for you. Here's how to request it. https://form.jotform.com/240386202609958