Dude, tempo is unchanged pitch blend in a track. Pitch and tempo are totally different! If you have a 136 bpm track, for instance, and you change the
pitch to lets say 140, then there's a huge increase in pitch blend, causing the key to change once or twice from its original state; however, if i increase the
tempo of it to 140 bpm, then the key will stay the same no matter what! That, my friend, is called time-stretching
Now here ur asking me to match the keys without changing the pitch or time-stretching? that's insane =/ if there's some sort of software out there that does that kind of shit then please enlighten me
he3!
glad you like it though

Thanks for the comments.
Yalla more ppl to come!! COMMENT OR ELSE!!