In a few hours I should be picking up a used 4 channel controller which gave me a bunch of new ideas. Several users have hobbled together older raspberry pis and limited graphics, or similarly limited setups with tablets, but how about something as functional as the contemporary all-in-one units?
Tablet or advanced single board pc with touch screen + hdd + controller is effectively the same as the commericial offerings. My understanding of earlier raspberry pis, was that they had a hard time with the waveform display. The 4th generation has solved that? Most/many dj controllers have ample room inside the casing to mount a sata drive and r pi sized computer. If cooling is necessary, a hole can be cut out and mini fan installed.
My goal is is to have just a single cable coming out of the controller connecting to the display device, and one for power, along with the required audio output. The display would show 4 deck information. Name, level meter, bpm, key, keylock, waveforms, time elapsed/remaining, but not info which the controller shows, like hot cues, grid, sync, etc. Engaging the library controller features would switch the display view from tracks to library, with touchscreen keyboard. Perhaps a few other touchscreen buttons need ot be added, to access menu, fx settings, etc.
The amount of work probably doesnt make sense if buying a new controller, but for anyone with an old but higher quality controller, one could save an easy grand and ditch the laptop.