banners

wavey!

Banners is a wavefolder with lfo for modulation. The lfo can be used without folding. There is an extra vactrol for futzing about!

There are three stages of folding with the last being ‘fuzz’ (optional via a switch), so not symtrical. As with most folders, it requires symetry on the input, so sine of triangle waves. Other input gets messy :)

Unlike most folders, banners uses a quad op amp for both the folder and a second one for the lfo. The conventional wavefolder uses oposing saturating npn/pnp transistors. It’s simpler with an op amp :)

Here a view of the oscilloscope of a melody from the keep through banner. This is just clean 2 times folding without fuzz.

Kastle in minimal mode through banners. I switch back and forth between symetrical and fuzz folding.

This is the breadboard view from fritzing.

https://github.com/poetaster/banners

This is a prototype device with one proper flaw. The switch between LFO and Wave modes makes noise if you tap on it in one or the other mode. So, it’s currently only for the experimental minded. You can purchase a built banners from me for 86 euros. DIY kits are not available yet since assembly is tricky and requires some work on the top plate. I’m still trying to work out how to build in a better type of switch.