As a very satisfied user of the original Audio Injector it would be nice to see the Pi Zero version materialize also.
Here you can see the AudioInjector stacked on a Pi 3 and on top of it you have DiscoHAT.
The Audio Injector has a potentiometer for the master volume. The sliders on the bottom control the relative volume of individual sounds during the play. The top line of sliders control the light scenes, chases and shows. (On top of this there is still a cue list controlling the entire play.)
Now there is a new PiZero WiFi version of the Audio Injector and it would also be a perfect companion for DiscoCap.
By using WiFi versions you can skip the monitor and mouse and use a WiFi tablet or a phone for controlling the show. So much less stuff to pack when going on a tour
If you feel interesting in making Audio Injector Zero reality then it is time to join the Kickstarter.