ZEN Instruments
A blog about electronic instruments from a DIY standpoint
Saturday, April 25, 2026
Gakken LFO Modifications (and Faking Log Pots with Code)
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We're continuing to look at the Gakken SX-150 mk II and investigate how we can improve it. Today we're focusing on the LFO. It...
Monday, April 6, 2026
Gakken Envelope Modifications and MIDI
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As part of a series on the Gakken SX-150 mk II, we're looking at the envelope. Much like the rest of the synth, it's very sp...
Wednesday, April 1, 2026
Gakken, Portamento Concepts, and Euler (fixed rate/time, linear/exponential glide)
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Last time we squared away the tuning for our Gakken SX-150 mk II by using Rossum compensation and a basic autotune formula . Now we...
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