Helium balloon (very high voice)2.ğunny sound (high voice)3. Available voices to select from and change during a call:1.Play funny sound effects during the conversation. After the call is answered by the other side, alter your voice in real-time.5. Make a DEMO call, hear your voice change!.The best and cheapest international phone calls in the Google Play!.Spice up your phone calls with hilarious sounds and voice effects.