Seconding the vote for the ESP01 kit. It makes the instrument much MUCH more playable - makes the pitch field even, adds a couple octaves, and makes the bass sound much more delicious.
Hello! and a question.
Posted: 8/21/2019 2:01:22 PM
After having installed several ESPE01 kits, as well as my own YAEWSBM module [LINK] in various Theremins, I'm between two worlds regarding the effects and side effects.
On one hand, the removal of coupling enables very low (subsonic) bass notes, and makes that low end less cramped and therefore more playable.
On the other hand, the removal of coupling makes the low end more oddly "meowy" sounding and bland. You often want the low end to have some "rasp" to it, which coupling generally imparts.
Instead of all-or-nothing in terms of coupling, a better situation would be to have variable control for this, or at least a programmable fixed strength (via an easily modified / replaceable physical component). I haven't tried it, but I believe this would be easy to do with the YAEWSBM by using a small value capacitor instead of a short across the defeating jumper.
To better understand what I'm talking about, listen to the MP3 I posted here [LINK] and read about how I made that recording. Every other sample you listen to is modifed / unmodified so you can directly compare the results of installing the module.
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