Electronic Circuit
-Virtual Ground Circuits
(https://tangentsoft.com/elec/vgrounds.html)

-Summing Mixer/Volume Control Resources
Better Volume (and Balance) Controls 
(https://sound-au.com/project01.htm)
How to Build a DIY Passive Summing Box 
(https://www.diyrecordingequipment.com/blogs/news/15851740-how-to-build-a-diy-passive-summing-box)
TASCAM’s DB-25 Pinout Standard
(https://tascam.com/content/downloads/products/220/DB-25_Pinout.pdf)

-Phantom Power - What It Is And How It Works
(https://sound-au.com/articles/p-48.htm)

VCO Resources
-Exponential Converter
(https://schmitzbits.de/expo_tutorial/index.html)
Synth Voltage Controlled Oscillator 1v/oct tracked DIY how to.
(https://www.youtube.com/watch?v=4Kz8YopLTCQ)

Transistor Resources
-Setting Up An Emitter Follower Circuit
(https://www.youtube.com/watch?v=n_bBF67mqk8)
-Transistor Push Pull Amplifier, for the Beginner, no transformer, the basics
(https://www.youtube.com/watch?v=e_SE4KQjYR8)
-The transistor as an amplifier (Part 1)(https://www.youtube.com/watch?v=WZD9RZoMhVE)
-Speaker BJT amplifier function
(https://electronics.stackexchange.com/questions/49860/speaker-bjt-amplifier-function/49904)

OpAmp Resources
EEVblog #600 - OpAmps Tutorial - What is an Operational Amplifier?
(https://www.youtube.com/watch?v=7FYHt5XviKc)

Filters
-RC Filter
(https://web.stanford.edu/class/archive/engr/engr40m.1178/slides_sp17/lecture14.pdf)

Guitar Effectors
-Schematics
(https://generalguitargadgets.com/how-to-build-it/technical-help/schematics/)
-Effectors
(https://generalguitargadgets.com/effects-projects/)

MCU Design
ESP32 Hardware Design Guidelines
(https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32/)

Gears/Capstan Drive
-Capstan Drive
(https://www.aaedmusa.com/projects/capstandrive)

PCB Design
-USB-C Design
(https://dubiouscreations.com/2021/04/06/designing-with-usb-c-lessons-learned/)

LTSpice Resouces
LTSpice audio simulation tutorial
(https://www.youtube.com/watch?v=wooPwEjlYoA)

Electronic Music History
-120 Years Of Electronic Music
(https://120years.net/)

Programming (Linux)
-JUCE Dependencies on Linux
(https://github.com/juce-framework/JUCE/blob/master/docs/Linux%20Dependencies.md)

USB Programming
TinyUSB a simple Tutorial
(https://www.pschatzmann.ch/home/2021/02/19/tinyusb-a-simple-tutorial/)

Segger RTT Tips
(https://www.codeinsideout.com/blog/stm32/segger-rtt/)