is it possible to make a dummy record like the nothing record (1978) that was cut with no music just the blank grooves and play that while i run digital audio somehow through the stylus cartridgeNo. The problem is that digital itself has artifacts called 'aliasing' which the digital industry does not like to acknowledge is actually distortion. In the analog world this form of distortion is a kind of intermodulation known as 'inharmonic distortion'. The ear is keenly sensitive to it! as its mostly higher frequencies. This is part of the brightness of digital.
The LP actually has wider bandwidth, being good in playback and record to at least 42KHz (my cutter system is bandwidth limited at that frequency to help reduce the likelihood of damage to the cutter; it can actually go higher). Almost any cartridge these days can go that high. While there isn't much information up there (mostly harmonics if anything) this does help to reduce phase shift.