hldj.org

I try it, press my play button ( p ) and... nothing

Ive asked around for help, uninstalled and reinstalled countless times and nothing happens

What version of HLDJ are you running?
Try re-adding the game using HLDJ 1.5 or see this topic to make sure you've go the correct game audio directory.

Also, after loading a song, search your Steam directory for the file "voice_input.wav" to see if HLDJ has created it correctly and post its location if so.

Could you tell me what to do with the voice_input.wav and how to get it ?, you must be a bit sick of it by now but all the stuff I saw while trying to look it up is a bit sketchy

You don't - HLDJ creates it for you when you select a song.
If it's not, make sure your game audio directory is correct.