After my long shot to make it to the semi-finalist round of the Hackaday prize did not pan out, I had to put this project on the back burner in order to focus on some more pressing life issues. In the mean time, however, I did manage to begin breaking down some common analog circuits to modularize them. The following is a list of potential module types:
- Buffers (these can be input and output)
- Transistor based distortion
- Op-amp based distortion
- Passive tone control
- Active tone control
- Passive attenuators
- Active attenuators
- Passive filters
- Active phase shift
- Active flip-flop switch
Each one of these types form basic building blocks, which can be assembled in a linear fashion to create a complete pedal.
As an example, to build a TS-808 you would assemble the following:
Input → Buffer → Op-amp based distortion → Active tone control → Passive attenuator → Flip flop switch → Buffer → Output.
Another example; to build a Big Muff, you would assemble the following:
Input → Buffer → Passive attenuator → Transistor based distortion → Transistor based distortion → Passive tone control → Buffer → Passive attenuator → Output.
It's easy to see then that hybrids of these pedals could be attempted by swapping out transistor distortion for op-amp distortion, or even stacking entire sections of pedals together.
How about an 808-Muff?
Input → Buffer → Op-amp based distortion → Transistor based distortion → Passive tone control → Buffer → Passive attenuator → Output.
Or how about using LFO and an active attenuator to create distortion vibretto?
LFO → active attenuator ↘
Input → Buffer → Op-amp based distortion → Active tone control → Passive attenuator → Buffer → Output
In future posts, I'll be sharing the generalized layouts of the specific module types.