I use a Samsungs Galaxy Star Pro GT-S7262 with Jelly Bean 4.1.2. I have installed quite a few call recorder apps from Google Play and though they are recording all the calls, whenever I play back the recordings it sounds like everything has been recorded in fast forward mode (or is playing as such). It is happening with all the call recorder apps I have installed. What could be the problem and how can I resolve it as everything sounds jumbled and indecipherable
I have the same problem and also installed many callrecoders, but all gave the same problem. I downloaded the audio files from my phone and loaded them into a sound editor (i.e. sony soundforge). I played the file 5.5 times slower and noticed that they played well, I could understand the conversation perfectly. So it seems that all is recorded only played back 5.5 times too fast. This is a problem which can not be corrected within the phone. My advice: download all audio files to a computer, convert and save them with the new speed. They will work fine!
I discovered that on my Samsumg GT-S5282, call recording apps will always record my files exactly 83.097% faster than the files should be.
As a workaround, I use Audacity on my PC to normalize the audio after recording. I change the Audio Speed by -83.097% and then change the Pitch by -4%, then export it as a .wav file. This fixes the audio so that it will sound normal when played back.