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  • Chord Arpeggiator Design: Part 3
    Previously in part 1 we diagramed a state machine to represent a chord arpeggio. In part 2 we determined what the sum of products would be for the state transition logic, and simulated the logic. Now it’s time for the next step which is to look at the physical implementation. I spent some time KiCAD […]
  • Chord Arpeggiator Design: Part 2
    Last time I started designing a chord arpeggiator. We got as far as and articulating the specifications and then drawing a state machine to handle note transitions. Today we’ll try to minimize the gate count for transitioning between states and then simulate the logic using VHDL. Logic Minimization I decided to use Karnaugh Maps because […]
  • Chord Arpeggiator Design: Part 1
    Today’s Post is brought to you by my latest questionable module idea that probably only I am interested in. The idea is a four note chord arpeggiator. And not just four notes that would be boring I want to be able to toggle whether a note is played, toggle if the arpeggio is ascending only […]
  • Tides 2 LEDs
    I’ve put together a few Mutable Tides 2 modules, and I think just about all of them have LED problems. Today we’re going to be looking at LED6 and LED7 which are among the audio jacks on the lower right of the board. As always it’s a good idea to look at the schematic. Not […]
  • JVCA Eurorack Module
    This Eurorack module contains 2 JFET based voltage-controlled amplifiers (VCA). VCA’s are a core component in synths. They’re commonly used in conjunction with an envelope generator for shapingsounds, or with two oscillators for tone synthesis. The inputs and outputs are buffered using fast professional audio grade op-amps to maintain signal integrity and performance. Specs Size […]