I am using music speed changer for lessons. We play along with the track, typically in a lower tempo. It would be really helpful to have msc add a count-in of 4 beats. (Maybe configurable according to the time signature of the song)
There is there delay playback feature, but that doesn't adhere to the tempo of the song and it is not audible.
Since the bpm is known, this shouldn't be too hard to implement, right?