こういうやつ

http://widgeteering.com/product/qwidget/

https://www.thatlittlebox.co.uk/usb-go-box

https://www.teamsound.nyc/store/go-box-6-rev-3

https://www.etsy.com/jp/listing/230295746/qlab-usb-button-controller-and-redundant?ref=shop_home_active_4


ハードに自作するなら
https://www.youtube.com/watch?v=WcxN5VnZucA&;feature=share

ソフトにいくなら
http://xkeys.com/utilization/theater.php