PenfoldBookChapter2 [view]
      PenfoldBookChapter1 [view]
           PenfoldBook [view]
      PenfoldBookChapter3 [view]
           PenfoldBookChapter4 [view]
      PenfoldBookChapter2/Vco [view]
      PenfoldBookChapter2/KeyBoard [view]
      PenfoldBookChapter2/Vca [view]
      PenfoldBookChapter2/Eg [view]
      PenfoldBookChapter2/Vcf [view]
      PenfoldBookChapter2/Psu [view]
      PenfoldBookChapter2/Mixer [view]
      PenfoldBookChapter2/NoiseGen [view]
      PenfoldBookChapter2/Lfo [view]