CalTrans : Great for octave shifts and tracking errors

Great little module and easy to use. Just set the lowest note you will use on one of 4 VCOs, aim for it to be the same note, then plug the output of the oscillator to the calibration in and the output of the desired channel back to the same VCO. Say out 1 to VCO 1 volt/oct input and when you select channel 1 from the flashing channels the channel will be swept through the octaves correcting for any tracking errors, this takes about a minute or 2. The calibration light will stop flashing. Now when you connect a keyboard or sequencer to channel 1 input of the above example the out goes to the VCO and now your tracking will be accurate and you can then octave shift easily with the encoder and also change semitones as well. The manual is quite good and explains most things well. The 4 lights at the top tell you when you are pitch shifting and you can quickly reset each channel to the base frequency with reference to the flashing lights and they will stop flashing to show you are at base frequency. You cant afford to be without this module for tonal music. Have fun.