For anyone who might be interested here are two octave pedal demos.
First is the sub only of the Okto Nøjs. There are 8 bars of each of the following tone knob clock positions: 7, 9, 11, 12, 1, 3, 4 and 5.
Okto demo.wav
Second is the MXR Vintage Bass Octave which is a clone of Janek Gwizdala's Japanese OC-2.
VBO demo.wav