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A demo of sorts (no audio in video)

A project log for Analog oscilator-less octave-down effect box

An "effect box" which works as octave-down effect (halves input frequency). No internal oscillator involved, no PLL, just analog maths!

ms-bossMS-BOSS 04/25/2023 at 19:240 Comments

Hi, I tried to make a demo but unfortunately my "sound card" thing I use for streaming is currently in our makerspace (well, because it's used for streaming). So as of now, no audio yet. But I will try to make a new video along with stereo sound, each channel having either the source or output audio, soon.

And yeah, it can cope with sine, triangle (making it an "almost sine") and square (not that good) wave input. Blue is input, yellow output. The reason why input is so noisy is that the effect was made with guitar signal in mind, so it is quite sensitive, requiring very low level where my old Chinese scope doesn't perform well (nor does the 50 years old Hungarian RC synthesiser). The output had probe mistakenly set to 1X (why the hell is even the switch there to always cause trouble?), so divide the 20V/line by 10.

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