You can playback with FLEX directly and pitch down with PITCH and RATE, if you record INAB or INCD. It behaves differently with SRC3.
As long as the play head is before recording head you can pitch up/down and reverse.
If the recording if finished, you can do whatever you want. So you can make short recordings and use 2 recorders in order to pitch up/reverse quickly after 1 step minimum, continously.
