It turns out the littleBits keyboard isn’t faulty – it’s the oscillator causing the problem and it’s not a fault. The littleBits oscillator has a potentiometer labelled “pitch” and a little dial labelled “tune”. This is misleading. What the dial label should actually read is “calibrate”. I bet almost everyone using the kit thinks it’s a fine tune dial, but its real purpose is to adjust how the component maps incoming voltage to outgoing pitch. Very confusing.
Another piece using the sixteen steps of the SQ-1. This time you can hear clearly what the El Capistan is doing to the sequence. I wish the littleBits synth kit had a full ADSR envelope. It’s only attack and decay. Once you put the envelope in the chain, you lose the ability to sustain. The envelope just runs its course.