The forbidden narrow wavy line - whether you spell it Do Re Me Re or La Ti Do Ti, in my experience it’s some kind of archetype, and I use it here as a ground bass. There is a little otherwise diatonic melody which features a falling microtonal glissando, and then I’m obviously improvising the rest, for admittedly too long, and it might be boring, so I added some visual effects for interest. The sound is coming from the TPX2s internal synth. The title “Zbogom dome” means “Goodbye, my home” in Serbo-Croatian.

Tonal Plexus keyboards have so far been built with one color option for the body of the instrument: black. A few months ago, I started feeling a bit bored by the monotony of the black body and I looked into the possibility of building the sides of the body in the color of the key color option - in blue, red, yellow, or green, to make the keyboard look brighter, more daring and lively. I started unofficially offering this option to customers last month. A TPX4s in green with the green body-color option is shown here. The option will be added to the order page soon. For the time being, if the colored body appeals to you, just mention it when you contact me before placing your order.

I personally prefer the colored body. I may also experiment with the controls panel to further highlight the color. I’m also experimenting with white as a body color, using white plastic instead of black for the finishing strips on the top and the right side of the instrument. At any rate, I’ll post pictures of more colored keyboards when I get a chance to build them.

You may also notice that the screws on the finishing strips are now flush, giving the instrument a sleeker look. I’m now building all the keyboards this way.

Here’s a rendition of Bach’s C Major Prelude and Fugue (opening) played in Just Intonation on a TPX4s Tonal Plexus keyboard. Obviously, Bach did not write this music to be played in Just Intonation (the “Well Tempered” part of “Well Tempered Clavier” has a specific meaning for tuning), so this is an experimental performance which uses pure 3rds and 5ths, natural 7ths in dominant chords, and harmonics reaching the 17-Limit in diminished chords. In several places, a common tone can be heard to ‘bend’ from one chord to the next (usually in ii-V progressions) where a pitch has to move by a septimal comma; the pitch is changing in real time by JND steps. This is a single take. I played only the opening of the fugue, very slowly ; ) This is for two reasons. First, so my fingers will behave and play the right keys, and second, so the sounds of Just Intonation can be savored a bit. Enjoy!