REFERENCES
1. Web page Learn about Electronics: Oscillators, accessed 29/11/18, http://www.learnabout-electronics.org/Oscillators/osc10.php
2. Book_Handmade Electronic Music, Second edition, Nicolas Collins, page 135
3. Video_ The simplest DIY Oscillator? Synth Project PART 2, LOOK MUM NO COMPUTER, posted 30/05/2018, accessed 29/11/18, https://www.youtube.com/watch?v=VZ1B0Epr770
4. Web page_ The Physics of Sound, accessed 30/11/18, https://method-behind-the-music.com/mechanics/physics/
5. Personal revision notes_Edexcel A-Level Physics_notes influenced from classes and Edexcel A Level Physics Student Book 1 by Mike Benn
6. Web page_ Sparkfun: Alternating Current (AC) vs. Direct Current (DC), accessed 1/12/18, https://learn.sparkfun.com/tutorials/alternating-current-ac-vs-direct-current-dc/all
7. Web page_ All About Circuits: DIY synth series part 1- The exponential VCO, accessed 29/11/18, https://www.allaboutcircuits.com/projects/diy-synth-series-vco/
8. Web page_ Secret Life of Synths: The VCO, accessed 5/12/18, http://secretlifeofsynthesizers.com/the-vco/
9. Web Page_ CEM3340 datasheet, accessed 5/12/18, https://cdn.hackaday.io/files/1605386868457792/CEM3340.pdf
FURTHER READING
https://electricdruid.net/cem3340-vco-voltage-controlled-oscillator-designs/
https://en.wikipedia.org/wiki/Oscillator_sync#Hard_Sync
https://www.electronics-tutorials.ws/filter/filter_2.html
DIY VCO 