This kind of feature can often be found on professional DJ equipment and is usually called "key lock" or "pitch lock". On Wikipedia its referred to as "Time Str

This kind of feature can often be found on professional DJ equipment and is usually called "key lock" or "pitch lock". On Wikipedia its referred to as "Time Stretching" [1] [1] http://en.m.wikipedia.org/wiki/Audio_time-scale/pitch_modification http://en.m.wikipedia.org/wiki/Audio_time-scale/pitch_modifi...