Vintage Revolution - Pedal Pro

[massi1234]

There are 4 micro processors in the PedalPro!? Holy cow! Can you elaborate on that (I know programming MCU's and digital electronics so I wouldn't mind if you get really technical ;-) ).

More general I would really love to hear more on how the PedalPro works at a technical level. Why you made the choices that you did. Recently we talked about digital pots (PM) and how they do not stand up to the job, yet you do use them in the main volume. Why?

Ciao,
about the 4 processors:
When I started the architecture and the feasibility study, I had in mind always a multiple-waveform synthesizer.
This is the real big difference with rest of the digital controlled devices.
If you have an analogue pedal, the waveforms that you can generate are very limited.
Thanks to this flexible architecture, each processor can be loaded with up to 16/18 different waveforms.
So that the waveforms used for the chorus can be different for the phaser, wah, and tremolo.
Further I always want it to reproduce the compression curve of a Vary-mu (Fairchild).
So, the secret is the PedalPro is not only in the component selection but also in the way we control the waveform generators.
Keep in mind that I want it to have no limitation in number of simultaneus waveforms and the ability to synchornize tjhem all with 4 values of relative phase (0 90 180 270).
If you want to have more info, I will be happy to answer more questions on the matter.

Regarding Digital Pot and volume controls, the PedalPro has 4 ways of controlling the volume. Each of them relates to a different technology and placed in different chain position.
1) VCA voltage controlled amplitude of the compressor using compression parameter. By increasing the attack to 85ms, you can transform your compressor in a powerful volume control/saturation control (if used to drive a distortion). This VCA (compressor) is placed in the beginning of the chain. Technology matched pair transistors
2) Opto resistor changing the gain control of the boost. Range -6dB: 25dB also placed in the beginning of the chain but after compressor and pre loop. Technology LDR
3) You can also use the VCA in the Tremolo as a volume control, by activating the function FOOTC. Technology matched pair transistor
4) Main stereo volume control via digital potentiometer placed at the end.
Technology dual potentiometer

@ Peter. We need a lot of luck tonight and no catenaccio!!!