I'd really love to see an #OpenHardware, #OpenSoftware matrix mixer & DSP processor. Likewise for modern PA systems, in order for them to be any use, you must rely on a proprietary matrix mixer and DSP processor to process and route the signals from the mixers to the loudspeakers. While I think this is largely "fine", it would be great to have something for smaller venues and operators who are running older and maybe cobbled together systems. Ditto for up-and-coming speaker system designers.