Recommendations for YouTube or Udemy courses on electronics relevant to audio?

[GibsonGM]

I really need to read those (again) and pay closer attention....   

[antonis]

I really need to read those (again) and pay closer attention....   

If you do so, op-amps will not be regarded as "black boxes" anymore..

[Gargaman]

I like this guy:

ok, it's not a course but you can learn something here and ther ramdomly as I do

[ElectricDruid]

I really need to read those (again) and pay closer attention....   

I learned so much by borrowing Ray Marston books from the library back in pre-internet days. I still have folders with photocopied pages of stuff I thought was particularly useful!

[Rob Strand]

https://purbasthali2goviti.in/wp-content/uploads/2021/07/EM-2nd_SEM-TT-Final-with_Syllabus.pdf

[potul]

Not so much on guitar pedals, but audio and electronics in general, you have this free Course

https://www.coursera.org/learn/audio-engineering

Take a look at the content and decide for yourself if it suits your needs.