The tiny, 80 Euro, 8-bit Kastle synth from Bastl just got better. A 1.5 revision updates the case, sound, and features.

First off, in addition to batteries, you can now run on micro USB power.

The case is updated, too. It’s fiberglass instead of acrylic for added durability, and has a slick black matte finish, plus better patch points.

And then there’s sound. Bastl Instruments say they’ve done a total rework on the sound engine, improving smoothness, ranges, and anti-aliasing performance.

Two sound engines running in parallel deliver three new modes: formant synthesis, noise mode, and tonal mode. Plus there are the existing phase modulation, phase distortion, and track & hold modulation, each with new improvements.

Formants: Inspired by the 1865 Helmholz synthesizer, you get combinations of harmonics / vowel sounds.

Noise: This glitchy mode comes from granular playback of a piece of code that’s run from the sound chip – basically an edgy ultra-digital glitched-out wavetable/granular source.

Demo here:


I’ll be in Brno, CZ Friday and Saturday this week and catching up with team Bastl, if you’ve got questions for them.