Testing new cards

I'm testing the new cards that arrived this summer - in particular the digital voice card controller

Errors found

VCO: 

- Square wave is probably inverted, just like on the previous version of the waveshaper

To do

- Tune VCO

- Trim WS 

To test

- VCO frequency vs waveshaper and square wave generator, is the phase inverted?

- Lowest possible frequency for VCO, looks like trimming down won't go as low as DCOs?

- Recon-filter and wave output from digital board, including switching on the analog board

- Control pins on the digital board, though since midi works we know we can control everything. 

What works

- Distortion! :-D 

- Noise

- VCO waves in general

- WS wave mixing is now perfect 

- Midi input on digital card

- DCO tuning

- CV DAC control with 5V and 50MHz signal (3v3 also works but only at 40MHz)

- Rear soldered header on the Teensy 4.0 

- I2C port expanders 

- Winbond W25Q128 flash chip integration from Teensy. Not tested with DCO but uses same circuit. Was tested with W25Q128_test.ino (adapted from https://github.com/msnbrest/W25Q128)

- PCB output /recon filter on digital board. However, output is 0-2V, e.g. not bipolar and not a big enough range.

UI Progress

I've cleaned up most of the UI now, though it's far from finished. The output and global fx sections will not be completed until the hardware is developed, the same goes for the center console. Still, it's starting to look pretty good.

Right now, the design is strongly inspired by (some would say ripped off from) the Waldorf Quantum Mk I and II, Matrixbrute and Polybrute, with a dash of Moog One and Alesis Andromeda - incidently, all those synths are designed by Axel Hartmann...

Colors are hard though, and even harder when various degrees of shinyness are not visible in my current model. 

Here are some variations:

 

A Polybrute blue version, with a large black acrylic sheet in the center

 

A more Quantum-esque center display

Slightly darker module color

  

A black with lighter modules version

A version closer to the original Quantum MkI or Matrixbrute, with black modules on a lighter gray background

 

A more color coded version, dark modules are "audio", mid gray are modulation and light gray are global. Keyboard stuff is now directly on the background

Same as above but more Quantum-esque display again

 

Introduced vertical separation lines. They don't line up with the clock/route divider which annoys me. It can be fixed by switching osc modulators and note/detune, but that feels wrong too. I like the divider between noise and ring mod though

Added waveform icons