pitch control for idj live + djay for iphone 4s

hello, I have an iphone 4s + IDJ live, my opinion is the following, would control the pitch of the IDJ live control the pitch of djay without him return to normal pitch when released control? could be used as is the crossfader that controls the id live while on the iphone? Actually I would like the pitch being used in live IDJ was more functional, for example could have an option in the settings of the iphone djay where when enabled him control the pitch like a cdj 100s and when not only enabled him to increase speed music momentarily when pressed the button pitch and loose speed when the music returned to normal. I do not know if I was clear in my opinion.