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Category: Synthesizer

  • Audio Digital Delay with DRAM and Arduino

    Audio Digital Delay with DRAM and Arduino

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    Ed
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    Aka “ADDDA” or “AuDiDeDrAr” or “aww dee dee drawer” or “A3DA” I’ve had this idea bouncing around in my head that you could use 1-bit wide DRAM as a delay line if you simply counted up through it’s addresses, reading and writing as you go. 1-bit wide DRAM like the M3764 have separate pins for…

  • Prototype Eurorack Frequency Modulation Synth Module

    Prototype Eurorack Frequency Modulation Synth Module

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    Ed
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    I have a few prototype Eurorack modular synth modules in the works. I tend to get them working well enough to be musically interesting and then move to work on the next prototype. It’s not because I don’t plan on finishing them – it’s more that all the biggest questions are answered and I want…

  • Analog meter synth module

    Analog meter synth module

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    Ed
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    I haven’t shared much about my modular synth, but I really should. I’ve created several custom synth modules – even designing PCBs and custom 3D printed faceplates for them. The circuit design is also my own although heavily inspired by the very helpful synth DIY community. There’s only so many ways to build an Arduino-based…

  • OPL2 FM Synth Module, part 2 – Prototype

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    Ed
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    I wrote earlier about a new eurorack synth module I’m working on. I left off having made a test bed that made some sort of sound but wasn’t integrated with the synth. This weekend, I built out the test bed to a full prototype and really got to take it for a spin. Guess what?…

  • OPL2 FM Synth Module

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    Ed
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    The OPL2, aka the Yamaha YM3812, is a multi-voice FM synthesis sound chip. It was used in early PC sound cards such as the Adlib and a variety of other arcade machines and computers of the late 80s and early 90s. It operates completely digitally and produces sound via a specific DAC chip, the YM3014.…

  • Planning the expansion of my modular synth

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    Ed
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    I have a very modest modular synth which I have been building for the past year. I recently watched the complete “Modular In A Week” (MIAW) series on YouTube and was inspired to follow its example of making solid incremental contributions to my rig. The MIAW series follows a conceit of each “day” of the…