Hello,
Which excact version of Buchla V do you use?
Are you fully updated?
What do you mean by "Incorrect midi mapping "?
When the pitch wheel goes into negative values the 'Modulation' switch on the modulation oscillator turns off and on creating a pop.
Have you assigned your Pitch Bend to the Modulation Switch in the mod osc?
The switch does click when you change the position. Is that the issue?
Seems to be some double midi mapping in the tutorial, an example is in the 'how patching works' and 'Modulators' lesson 1.
I don't understand what you mean by this. Please provide an explicit example.