I've installed the Call Recorder app on my GT-S6810P Samsung Galaxy phone. The app has successfully recorded all of my calls but when I play them back it plays them too fast. Is there any way I can slow them down?
While the app that you installed might not have an option to change the speed of the recording, and I'm not sure why it would play it faster than the original, you can download a music player app which allows for speed change, and play your recording there.
The app that I've used is called Music Speed Changer. It's free and it allows for speed change while keeping the same pitch. When playing the recording in this app you'll see a slider for speed change adjust it accordingly.