Fermentum is still a work in progress. Here is a quick video of a recent batch of kimchi with pH and CO2 sensors added in. One of the interesting things happening here is that the jar of kimchi had a lid on it up until just a few minutes before this video was recorded. Thus, the tonal shifts heard here are caused by escaping CO2. It's something to keep in mind as I move forward in the project and think of how it may be displayed. One option would be to have the fermenting vessel 'perform' when opened...more to come!