Why won’t my external oscillator properly track the pitch of the Mother-32?

There is likely an impedance mismatch. The KB output of the Mother-32 in some circumstances may require the assistance of a buffered mult in order to properly drive one or more external oscillators over a wide range of octaves.

This should fix the issue: 

1) Patch the KB output of the Mother-32 into the input of a separate buffered mult.

2) Then patch an output of the mult into the 1 Volt/Octave input your external oscillator.