I just received an MI Marbles but the voltage range button is not lighting up. I think it might be broken.

Is there any other possible other reason why it's not responding (and lighting up).


Should be light up. Maybe it's just the led? Verify the voltage range with an oscillator (or pitch input). You should be able to switch between 0-2v, 0-5v or -5v-5v for the X outputs. Write to support@mutable-instruments.net for repairs.


I just realized that the length was on. Apparently it does not light up when the length button is pressed.

Is that normal?


I forgot this one! Yes it's normal. This button enable the external processing mode. Cv is sample from the spread cv input and Marbles switch to shift register mode.