I don’t know, here’s the Art of Noise vid that I pull those pics from. They must have everything right because it sounds to me like a p bass with flats and the treble rolled off imo, it sounds Ds really good. Unfortunately you must click the “watch on YouTube” to see itThe tracking of Roland synth basses is lousy because it takes a half-wavelength before the pitch can be identified. Bass is tuned an octave lower than a guitar, so the delay is twice as long.