Stumm is bank of 6 groupable and click-less mutes. Simply switch up to hold the mute or down to momentary mute. But it’s the grouping that takes this module to different places. You can assign each channel to group A, B or none at all. You then have a single mute switch over an entire group. This makes it a pretty flexible performance device for grouping together percussion sounds or melodic sounds etc. Stumm will be available in August for £180.

https://www.gearnews.com/superbooth-2019-future-sound-systems-and-mute-collaborate-on-2-modules/